MacBook :: Tried To Reset The NVRAM And The PRAM But Cannot?

Aug 9, 2009

I have already covered these steps:1. I have tried a safe boot. 2. I have tried to reset the NVRAM and the PRAM.3. I have tried to reinstall OSX from the Install Disk.4. I have tried to repair the HD and tried to repair permissions using the Disk Utility. he issue started out as the flashing Apple/Question Mark Folder/"No" sign. I attempted to follow the steps on the Mac Support Forums (ones listed above) and the issue developed into the picture shown.


MacBook Air :: Resetting PRAM And NVRAM?

Jun 5, 2012

Is it ok to have a PRAM and NVRAM reset two times a week?

MacBook Air, Mac OS X (10.7.4)

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Mac Pro :: Firewire Ports Stopped Working / Resetting PRAM And NVRAM

Sep 3, 2010

I have a 2006 Mac Pro and recently my firewire ports stopped working (front and back). I did a little searching around found a suggestion to try resetting the Mac's PRAM and NVRAM by holding the Cmd-Option-P-R keys down while booting. I have tried this numerous times and it doesn't seem to do anything (i.e. the Mac just loads OS X and doesn't re-boot like the instructions say). I'm using a MS Wireless Comfort Keyboard for Mac. Can you reset using a wireless keyboard?

Since I wasn't making any progress with that, I was toying with bringing in the Mac to a genius bar. Never having used the genius bar before - how does it work? Do I bring the computer in and leave it with them? Do they work on it while I'm there? I don't have an extended warranty so do they charge time and materials? I'm wondering if that might get awfully expensive and if I ought to just buy a PCI-X firewire card instead.

Any suggestions?

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OS X :: Graphics Hiccup At Startup - Need To Reset NVRAM

Aug 27, 2010

Unless I reset the NVRAM, there is a screen hiccup at startup. Right after the Apple logo, but right before the blue screen, there is a graphics glitch where there are a bunch of gray lines/marks for a second, then it starts up normally. It goes away after resetting the NVRAM. I did a clean install of OS X Snow Leopard to see if it would go away, but it's still there. I don't want to reset the NVRAM again because I don't like how the computer starts up at a bright setting.

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MacBook Pro :: It Won't Boot After PRam Reset

Mar 6, 2012

I have a MBP 13inch from 2011

recently i zapped my Pram becuase i was having trouble with a external screen but when I turned it on again the screen when to the grey screen with the apple logo and spinning gear but after 2 hours of wating the screen is still the same. What can i do to get back onto my mac?

Info:MacBookPro, Mac OS X (10.6.8)

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MacBook Pro :: When Do A PRAM Reset They Prompt For Password

Mar 12, 2012

when i do a PRAM reset, they will prompt me for a password or serial, may i know what password or serial is that?

MacBook Pro, Mac OS X (10.7.3)

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MacBook Pro :: Reset SMC And PRAM - Still No Ability To Auto Sleep

Aug 22, 2010

Today I noticed that my mid 2010 MBP is not automatically sleeping. I ran Apple's extended hardware test, along with TechTools Pro 5 from AppleCare disk. Both passed. Reset the SMC and PRAM. I'm still not able to auto sleep. Is there a way to see what exactly is causing my computer to not automatically sleep? Console messages or something?

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MacBook Pro :: How To Reset PRAM/Start Up Sound Loud/Implications?

Jul 9, 2009

I recently purchased a 13" 2.26 stock macbook. It's perfect, screen is good (no scrolling issues or purple blues) with no dead pixels, no slanted keys, and no scratches.

I updated the firmware that addresses the SATA 1.5 issue. After the update, I reset PRAM. I held down the buttons till I heard the second or third startup bong.

Here is where it gets funny.

Now, when I reboot or start up my computer, the start up noise is loud. Even with headphones plugged in and also the volume turned to its lowest setting (even with volume turned off). Eventually, to control the startup noise, I had to install the startupsound program in my system prefs as mentioned on other threads and that has seemed to control the startup sound.

I was wondering, if by resetting the PRAM if I have harmed my computer in any way. Should I be worried about deeper issues with my computer since the startup sound was not previously being affected by reducing the volume to zero with headphones plugged in?

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MacBook Pro :: Firmware Password Will Not Reset - Resetting PRAM Fails

Apr 29, 2012

Firmware password will not reset. Resetting PRAM fails. Resetting NVRAM in Open Firmware fails. Resetting PMU fails.

MacBook Pro, Mac OS X (10.7.3), (MacBook pro 8,1)

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MacBook :: Shuts Down When Unplug Magsafe - Reset PRAM / SMC To No Avail

May 18, 2012

I have tried SMC and PRAM resets, and the issue has not been resolved. My magsafe is lit up with a bright green led. Battery status is "Not Charging." When I unplug the magsafe, the system immediately shuts down. Battery is brand new with only 2 cycles. While I can use the laptop with power connected, this is an issue that needs to be corrected asap, as I use this computer for performances consistently and if the power cord gets removed, I'm not in a good place.

MacBook, Mac OS X (10.6.8)

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MacBook Pro :: Unable To Boot Past Gray Screen - Reset Pram

Jan 8, 2011

My macbook pro won't boot past the grey screen, I've tried reseting PRam, running fsck from single user etc to no avail. All signs would point towards a hard disk failure, but the curious thing is that it sometimes mounts in disk utility when booting from the install CD, so theres a little life left in it yet! I have fairly recent backups of most of my files, but there are a couple I've been working on in the past few days that won't be backed up. So my question is this - is it possible to copy files from my mac HD onto a external drive through the terminal/disk utility while booting from the CD.

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OS X V10.7 Lion :: How To Reset PRAM And SMC

Mar 21, 2012

I am running Mac OS Lion (10.7.3) on a 8-core Mac Pro. As I turned on my mac this morning, I found out that I was unable to use my wireless mouse, and also that I couldn't open my bluetooth settings. Apparently, the entire module disappeared from the System Preferences, and when I went to one of the articles on here, I saw that I'm supposed to reset my PRAM and SMC in order to make my bluetooth work again. The problem is, that I don't know what PRAM or SMC are, nor do I know how to reset them.

Mac Pro (Mid 2010), Mac OS X (10.7.3)

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Hardware :: No Sound And Can't Reset My PRAM?

Jan 20, 2009

I have a 17" Powerbook G4 1.5 GHZ. I lost all sound from one moment to the next. System preferences says Audio output Headphones however no sound from Headphones either. I tried to reset my PRAM, however when I hold down "Option" "Command" "r" and "P" the computer won't restart. The hard drive seems to be stuck at this point and won't go any further. I went to the Apple store and the Genius lost patience and said we should send it out. (I'd rather not)

I have also reset the PMU

Everything else works fine.

I've looked at several other threads and post. Everyone with a sound problem seems to be able to get it resolved with a PRAM reset. However I find nothing on my the problem of not being able to reset..

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Power Mac G5 :: Blank CDs Not Mounting -trying To Reset PRAM

Nov 30, 2007

I have tried two different brands of blank CDR in my drive and both times, they fail to mount and in Disk Utility, show up as Sony DVDs (neither of them is a Sony or a DVD), but not writable. I have no problem with media that already has content. I've tried resetting PRAM, but nothing else yet.

Powermac G5
Mac OS X (10.4.10)

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Mac Pro :: SMC And PRAM Reset - Keyboard And Mouse Delay?

Feb 25, 2008

I tried the SMC & PRAM reset. Now, there is a delay in my keyboard and mouse. For example as I am writing this, as I type, I am observing a ~1/4 sec delay between me pressing a key and the GUI registering it. The same with the mouse. I can click-and-hold over say File and move it up and down over subsequent menu items and it the GUI doesn't highlight the menu item unless I slow down the movement.

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OS X :: Reset PRAM For Network - Troubleshooting Steps?

Aug 15, 2010

Can someone explain to me why resetting PRAM on a machine has any effect whatsoever for networking issues? ie; self assigned ip etc. I have noticed this is a common troubleshooting step that a lot of people are recommending for issues related to networking.

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OS X V10.7 Lion :: Reset The SMC, PRAM Or Repair Permissions?

Jun 29, 2012

When exactly do you need to reset the SMC, PRAM or repair permissions? 

iMac, Mac OS X (10.7.3), iMac Late 2009

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OS X V10.6 Snow Leopard :: Mac Chimes As If PRAM Is Being Reset When Restart

Apr 9, 2012

When I restart my Mac it chimes several times as if the PRAM is being reset. Could this be telling me my internal battery is dead?

Mac Pro, Mac OS X (10.6.8), 8 core 9gb RAM

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OS X :: Properly Reset PRAM - Start Up Sound Before Releasing Button

Jul 19, 2009

I understand the steps needed, but how many times should I reset the PRAM and how many times should I here the startup sound (in total) before releasing the buttons?

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OS X :: Attempted To Reset The PRAM On Macpro Running Snow Leopard?

Sep 11, 2009

I attempted to reset the PRAM on my macpro running snow leopard this morning, by rebooting and holding cmd-option-p-r until the apple logo appeared, at which point I released and then machine then rebooted a second time. I went back to the computer about an hour later and it was stuck on the apple logo screen, with no sounds coming from the CPU. I did a hard reboot by holding down the power key and it started up fine. I've never reset the pram before and so I didn't know what I should expect as far as the process being successful, but after an hour stuck on the apple logo I figured it got stuck on something.

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Software :: Can't Reset Pram - Going Straight To Gray Screen And Starts Up?

Feb 25, 2006

I have a G4 MDD Dual 1.42ghz, When I hold down the Command-Option-P-R keys during restart it doesnt do anything. It keeps going straight to the gray screen and starts up. I dont know what to do. Anyone know whats the problem? Also my computer cant wake up from sleep or even go to sleep all the way.

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Intel Mac :: Startup Tone Lost - SMC And PRAM Reset Done But No Avail

Jun 26, 2012

I lost the startup tone a couple days ago. I repaired permissions, did an SMC and PRAM reset and it makes the tone while doing the PRAM reset but the next time you turn it on it doesn't make a sound.

iMac, Mac OS X (10.6.8), 3.2 GB Dual Core

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IMac :: LCD Backlight Bleed / Reset The PRAM Which Figured Wouldn't Work?

Sep 13, 2009

So I contacted Apple this morning regarding the LCD Backlight Bleed on my iMac (24", early 2008, 2.8 ghz) They made me reset the PRAM, which I figured wouldn't work, and the issue is still there.

They say it'll have to go in for servicing, and I live nowhere near an Apple Store, so they gave me the location of the nearest London Drugs. Am I going to get the same quality of service as I would from an Apple Store? And what is the exact process that they use, do they just replace it with a new LCD?Also, he said that it will be covered under Applecare unless it is ruled as accidental damage, he said that much of the time, the issue is caused by pressure on the back of the case, and that if that was the case, it wouldn't be covered.I can't really see how this would cause it, and I haven't ever put any pressure or anything on the back, but i did buy the iMac used, what are the chances of this being ruled accidental damage?I have the bleed in all four corners of the screen, if that makes any difference.

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OS X :: Verbose Mode Stuck (not NVRAM Command)

Jul 6, 2009

Few months ago I modified some plist somewhere to force verbose mode booting. It was not the NVRAM command. I remember adding a <string>-v</string> somewhere. But now I have no clue where it was.

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MacBook Air :: How To Completely Reset Computer So That Passwords Are Disabled / Reset

Jul 4, 2012

It has been a while i havnt used my MacBook Air. I forgot my passwords to enter.How do I completely reset my computer so that passwords are disabled or just reset?†

MacBook Air, Mac OS X (10.7.4), TalkTalk; Huawei Echolife HG532

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MacBook :: Zap PRAM After HDD Replacement?

Mar 1, 2010

With the early uMB 2.4 do you have to zap the PRAM after you upgrade your HDD? if so how do you do this?

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MacBook :: PRAM No Longer Working?

Mar 28, 2012

I cannot reset my computer’s PRAM anymore. What can I do to fix this myself?

MacBook, Mac OS X (10.6.8), Purchased September 20, 2008

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MacBook Pro :: Which PRAM Battery Suitable For G4 PB (A1106)

Oct 19, 2009

I think my PRAM battery is dead (date resets to January 1st 1970 when started up with main battery removed) but I can't find a replacement PRAM anywhere (I'm in the UK). According to iFixit the part number is 820-1686-A - is this the only PRAM module that will work in my machine? (I've seen lots of other similar looking parts on eBay, but with different part numbers). Also, is it not possible to actually just replace the battery, not the whole circuitboard? It looks like a regular watch battery I could pick up for $5 from the pic.

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MacBook Pro :: Resetting The PRAM - Won't Stay Asleep

Nov 2, 2009

I have a February 2008 MBP and am having issues with keeping it asleep. I currently have it set up as a desktop connected to an external monitor, keyboard and Magic Mouse (along with a variety of other peripherals) and I've recently noticed this issue. I'm running 10.6.1, I have tried everything from resetting the PRAM, SMC and repairing disk permissions to even installing a clean copy of Snow Leopard and restoring from Time Machine backup.

For power management, I have it set to never sleep, since I manually set it to sleep and don't want it sleeping on me when in use. I also have Wake on LAN activity disabled. Yet when I set it to sleep, at approximately noon the next day it wakes up by itself. I've even turned off the Magic Mouse to make sure it wasn't being moved by vibration and waking up the Mac. I'm completely stumped!

For troubleshooting purposes, I've installed a clean copy of SL without restoring TM backup to see if it's a program that's causing this issue or if it's a problem with a peripheral. I've yet to check back on it as I'm at work, but I'm hoping it's just software related. I'm at a loss as to what to do.

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MacBook Pro :: Dead PRAM Battery Causing Failed Startup?

Jul 28, 2008

one of my Al Powerbooks decided to kernel panic twice in the past two days and both times fail to start up afterwards. The symptoms would be that when I pushed the power button, I wouldn't hear the Apple startup sound and it would just sit there.

Well, after a few tries and some sadness, I decided to remove the PRAM battery card and voila, computer boots up perfectly! This has actually happened twice (removed PRAM card, booted up, then put PRAM card back in, then eventually exact same situation occurred again), does anyone know if a PRAM battery card can possibly wreak suck havok on a G4 running Leopard.

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MacBook Pro :: PRAM Battery Dying On 38th Week 2009?

Apr 4, 2012

Now normally I wouldn't expect it in an under 4 year old machine, but the normal battery is working as expected.  However, when I'm not plugged into power, my WiFi doesn't always reconnect, and when it does, the internet doesn't seem to connect either 90% of the time.  When I'm plugged into power, no problem.  3 other machines on the same wireless network have no issues with it, though my cable company says they are detecting intermittent signal loss, which I can't reproduce on any other machine.  The other reason I believe it is the PRAM battery and not the main battery, is during one reboot, the date reset itself to year 2000.  Once I managed to reconnect the internet, I was able to set the date & time to the time server.

10.7.1 iMac 5,1 MacBook Pro 3,1, Mac OS X (10.7.1)

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Software :: Macbook Pro Won't Boot / Will A PRAM Zap Kill My Windows Vista Hard Drive

Jan 21, 2009

Hi everyone, I have a big problem. Today, I noticed that my Macbook Pro was running a bit strangely, with some video being slow and stuff, so I restarted it while it was in Windows Vista through BootCamp. I came back about ten minutes later to see a black screen, and the computer still on. I don't know if it restarted or not. I tried hard resetting it countless times, and messing with the battery like letting it run dry and stuff, but whenever I keep turning it on, I hear the "dong" boot sound, but the screen doesn't turn on, ever.

No I'm wondering if a PRAM zap will help fix the problem, but I really don't want to lose the hard drive and the stuff I have on it. I have a TON of school and work files on there that I simply cannot afford to lose. Will a PRAM zap kill my Windows Vista hard drive or should I even go ahead with it? I really hope that I can fix this problem myself, because the nearest Apple Store (and Geek Squad place that supports Macs) is over 40 miles away, and I really need the stuff for school on Tuesday.

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Mac Pro :: PRAM Keeps Resetting By Itself?

Feb 28, 2010

recently had a small USB issue, so I reset my PRAM which fixed it.Now every time I boot the PRAM will reset itself. This particularly annoying because:1) It takes longer to boot as it restarts again and again (sometimes 3-4 times).2) I have the boot volume set to 0 and when the PRAM is reset it will go back to default which isn't fun [and it loud].

3) I have verbose mode on and a PRAM reset removes that as well, so I need to do the 2-finger combo [which on the bluetooth keyboard doesn't work half the time].I can't seem to fix it. I've done all the usual things (ie: manual PRAM reset with 4-finger combo, SMC reset, reseating hardware, disconnection hardware) and I've also gone ahead and installed OS X on a new volume for testing. Nothing is working and this getting a little frustrating.I try not to restart my computer, but recently I've needed to it a couple times. Apple Support doesn't know what to do and they're reluctant to send a on-site tech because they're not sure what the issue is. They want me to take my computer to the Apple Store, but (1) I don't have a car, (2) it's windy and snowing like crazy outside so there is no way I'm walking a mile to the Apple Store carrying the Mac Pro by hand, and (3) even if it was sunny outside my computer weighs a lot.Anyone know what's going on here? The computer passes all hardware tests and disk scans reveal no bad sectors.

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OS X V10.5 Leopard :: Unable To Zap PRAM

Apr 22, 2012

For some reason (and I'm going to assume this only occured after I hit "software upate" a few weeks back) I can no longer ZAP my PRAM. Tried everything (inclding unplugging peripherals and connected drives) but to no avail. I can NO LONGER zap my PRAM. Any ideas why this occured and how to resolve it?

Info:Quad-Core Intel Mac Pro, Mac OS X (10.5.6)

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OS X :: Zap PRAM - Repair Permissions & Run FSCK?

Sep 20, 2004

The idea for this quick GUIDE was thought up in this thread by kingjr3. Like the networking thread the idea of this is to have a quick point of reference for those common questions. How to Zap PRAM Zapping PRAM is simple, just reboot your Mac and hold down "Command(the Apple key)+Option(the Alt key)+P+R" while it is booting, when you hear the startup sound for the seond time the operation is complete, and you can release the key combination. Now just let your Mac boot as normal. How to Repair Permissions

- Navigte to "Applications > Utilities", and open up "Disk Utility".
- Select the volume where your OS resides, and hit the "Repair Disk Permissions" button.

If you are comfortable with using the Terminal (Applications > Utilities >, you can also enter this command to run repair permissions - "sudo diskutil repairpermissions /" (without the quotes), just enter your password when prompted. How to run FSCK

- Restart your Mac holding down "Command(the Apple key)+S" key to enter 'Single user mode'.
- Type "fsck -f", and hit return.
- Once complete type "reboot" and hit return to reboot you Mac back in to OS X as normal.

If there is anything that you think is wrong here, or you think I have missed any vital steps out, please post and let me know so that I can ammend this.

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Change PRAM Battery For IMac G5 ISight

Apr 3, 2012

How do you locate and/or change the PRAM battery in an iMac G5 (iSight)?

iMac, Mac OS X (10.5.8), PPC, 20", G5

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Mac Pro :: Changing Screen Resolution By Zapping Pram

Apr 18, 2012

I persuaded a friend to go down the mac route. He now has a 2006 mac pro running Lion. When he boots up he sees the apple and the little counter thing, whatever it's called, and then the screen goes blank and his monitor tells him that there is no signal. I suspect it is as he is putting into VGA via an adaptor where previousy it was attached to apple cinema monitors and the res is set too high. I am trying to find a way to reset the screen resolution blind as he doesn't have anything else to put it through.

Would zapping the pram affect screen res, and if so what else into the bargain?

Mac Pro (Early 2008), Mac OS X (10.6.8)

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OS X V10.7 Lion :: Resetting PRAM With A Wireless Keyboard?

Apr 26, 2012

I used to reset the PRAM by restarting and holding alt+command+p+r My new iMac came with a wireless keyboard and this way of resetting is not working. Apparently the Mac starts before it hooks with the keyboard.  

iMac (21.5-inch Mid 2011), Mac OS X (10.7.3)

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PowerPC :: Powerbook Will Not Power On - Disconnecting The PRAM Battery?

Jun 22, 2007

My Powerbook will not power on. I have followed some instructions on disconnecting the PRAM battery and that did not work, any ideas? I just stopped coming on without any explination.

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OS X :: Pram Resetting Create Effect On Repairing Permissions?

Aug 3, 2010

What does everyone mean when they say this?

What does it do?

Basically, all the general information about it.. I've been reading people's problems and I see this all the time, and I'm totally confused on what it.

Also, what is PRAM? What does resetting it do?

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