IMac :: Making Loud Whir When Fast Switching Enabled
May 16, 2009
I was watching WWDC 2003(panther intro) this morning, and I only just learned about Fast Account Switching from it. So, right after watching, I went to system preferences and enabled fast switching. However, right after I did this, my iMac made an unusually loud whir, which I assumed was the hard drive loading some files, although I have never heard it do this before. After about a minute of hearing this, I assumed that something was wrong, and I quit all applications other than system preferences, and when it didn't stop, I disabled Fast Switch. The iMac quickly quieted down. After thinking about it, I realized that I only had 1GB of RAM in the machine, which may cause the system to use virtual memory. Would having 2GB or even 4GB make this not happen, or would I need more than that? I never have noticed the iMac lagging in other areas, but would RAM help in general tasks too?
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Aug 23, 2009
I just bought my MacBook Pro last week. When I power it up, it makes a loud noise for about a second and a half. I think it's the hard drive starting up or the disc drive. I'm not sure which one, but it's pretty loud, so I was just wondering if anyone else noticed this and if it is normal.
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Sep 4, 2014
My iMac suddenly making a really loud noise and I had to turn down the computer and reboot it
This happened several times and I'm not sure what is the cause of it
Info:
iMac, iOS 7
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Apr 19, 2010
iMac, late 2006 Generation
XP info:
System:
Microsoft Windows XP Professional Version 2002 Service pack 3
Computer:
Intel(R) Core(TM)2 CPU
T7400 @ 2.16GHz
2.16GHz, 2.98 GB of RAM
Physical Address Extension
Leopard info:
Version 10.5.8, same hardware.
I've installed XP via Boot Camp. The internal drive in the mac is 230gb (total), and I allocated 60gb to XP. I formatted the partition to NTFS (not quick), and completed the rest of the setup. I then inserted the Leopard DVD and installed the boot camp drivers. Then I downloaded all available updates for XP, and the only other thing I've installed is Mozilla Firefox. I've also made changes to the system using an optimization guide (link below), and the performance seems to be the same before and after.
[URL] - I've only done as far as number 20.
The performance is very sluggish. It shows most while scrolling. It's not smooth and jitters a lot. On previous installations of XP on this computer, I've run audio software (Pro Tools/Cubase) and the performance is terrible. It can't handle even the simplest of tasks.
On the Mac OSX side of the machine, however, performance is fine. Everything runs smoothly.
As far as I know, the specs of the computer are pretty good. I can't understand why performance wouldn't be up to scratch
So, I'm just wondering if anybody has any ideas on what's going on? Is this normal, or am I missing something? It seems like Windows isn't using the full power of the hardware.
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Nov 24, 2010
Today, I got home and turned on my iMac 21.5 inch. On a typical day, I'd here the "BONG" and then everything would be normal. Today, my fans, or something inside the computer, sounded like it was going crazy. I have no idea what's wrong.
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Nov 17, 2010
My family just recently upgraded from an old PC to this 27" iMac, during the early part of the summer. While using it over the last little while, I would notice a noise that sounded like a harddrive spinning or possibly some sort of a fan noise. The best way to describe it would probably be as digital noise. It's not incredibly loud, but it's a decent volume, and can get quite annoying. It has a little bit of a squeak to it.
Over the last little while, it's become more constant. When the computer is in use, it'll usually occur quite often. It's quite annoying and obtrusive when I'm watching videos and I'd like to know what it could be.I think our computer is still under warranty, so I'm hoping to find out if it is something wrong, so I can get it replaced.
I've also been wondering if it's a fan, or a regular noise. However, it's so constant that I'm starting to wonder. The other night, I was watching a video and it seemed like it was coming on every 30 seconds for a long span of time. We don't run any memory heavy programs on this computer. If anything, we're just using Firefox, iTunes and/or Messenger. Sometimes Office. There's little to nothing stored on this computer, as it's brand new, so most of its memory is free.
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Feb 14, 2010
I have a 20 inch 2.66 aluminum iMac that came with a 320GB HDD. Lately the HD seems to grind for a long time when I launch any programs. The whole computer seems to just be waiting on the HD to catch up. I have 4GB of ram and it never uses all of it but I can hear the drive reading/writing while I wait for apps to load. Most notably safari, cs4, etc. but it does happen on many other programs. I thought that the issue was that it had been going on a year without a reformat, I waited until snow leopard came out and completely wiped the drive and installed 10.6 on it. However the slowness came back and I have since formatted again only to have the same problems. Has anyone else experienced these slow HD's? I have run Drive Genius on it and there is no bad blocks/SMART is verified.
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Aug 14, 2009
When the MBPs came out with the dual graphics cards, people believed that they would be able to fast-switch between then. However, this is not the case; a logout-login is required to switch between the 9400M and 9600M GT on the MBPs. It was thought with the release of Snow Leopard this would be fixed.
So, has it been? will it be? Any word on using both graphics cards at the same time to boost performance?
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Jul 13, 2010
Is there anyway to fix this other than buying a new graphics card? I've searched but couldn't find a solution. The 7800GT in my G5 always spins at top speed and is so much louder than the whole system. I've had it disconnected for a while but I don't want it burning up . Thinking I just might wire it to the 5v side of the molex connector on the optical drive?
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Nov 23, 2010
I'm using a 2.33 GHz MacBook Pro running the latest version of SL. I periodically like to step away from my desk, so I'll click on my name in my Mac's menu bar to initialize 'fast user-switching', so that no one could use my computer without entering a password (similar to "lock" in Windows XP+). When I log back in however, I find that the desktop background that I had set was automatically changed to the default SL background. Could any of ya'll provide an explanation as to why this happens?
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Jul 1, 2008
Ever since "upgrading" to 10.5.4 yesterday, fast user switching has been having problems. Randomly, when I change to another account (all are password protected), it will just instantly log me out, without even trying to close apps etc. - it literally takes it a second to log out, then I have to go back in and log in from scratch.
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Jan 10, 2009
is it possible to enable fast user switching without having to enter a password?
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Feb 1, 2010
I have a quick question on how "Fast User Switching" is implemented in OS X. I have added an account in OS X yesterday for my wife, and I have enabled fast user switching.Now, what I wonder:- Do my downloads continue when my wife switches to her account? Example: Transmission (bittorrent), will it continue with uploading/downloading when my wife switched to her account?
- Do my applications continue to run when my wife switches to her account? Example: Handbrake (converting a movie). Will it continue with converting while my wife switched to her account?
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May 16, 2010
When I'm logged in as root I notice the fast user switching menu doesn't display the short or full name, just a blank space. In my regular account, it does. Is this normal?
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Jan 28, 2009
I used FUS years ago, but I can't get it to work now. I clicked Login Options in the Accounts preferences pane, and checked Use Fast User Switching. But when I log off any user, it closes all the applications and actually logs out. And when I switch back to any user, it loads all the apps from scratch and starts them up again. And when I log out as user X and log in as user Y, if I execute who, I see indeed that user X is not logged in
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Jan 26, 2007
I was switching between accounts. When I switched to my admin account, the computer went to the original welcome to your new mac set up video with all the welcome words in different languages, then started with the new mac set up stuff, ie, what's your name, etc. I tried apple Q but that didn't work, so I restarted the computer with control, apple, start. Now my computer just shows the white screen with apple and the round spinning circle.
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Nov 30, 2014
After upgrading to Yosemite, I had very serious problems with fast user switching. I do software development using my BackBook Pro, I need to switch between different accounts for testing/debugging purposes.
As long as I use fast switching, I will eventually have a system hang when logging out, login or shutting down. I either got blank screens, or dead login screen. In the end, I had to press the power button for 3 seconds to do a brute cold power off.
Info:
MacBook Pro
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May 5, 2012
My mac is making very loud sounds. Hard drive or fan. comming from the bottom right hand corner.
Info:iMac
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Jul 26, 2010
Anyone else having trouble with youtube? Clips keep stopping for a little while with a spinning ball then continue. This started a monthago.
I am running the latest OSX version on a current Mac Mini with 4Gb RAM
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Nov 15, 2009
My friend's Macbook Pro (2006, 1.83ghz, upgraded to 2gb ram) has been making ridiculously loud fan noises. We found it was coming from the right fan, sounds like something is scraping - almost a tractor engine-type sound. I have a newer Macbook Pro and I installed fan control 1.2 on both of our macs to compare. It turns out on hers, the LEFT fan is running at 0rpm and the RIGHT fan (the noisy one) is running at fairly average speeds (compared to mine, which is quiet - between 1500 and 3500rpm). The temperature seems to be on par with mine (about 115-140 degrees F). We did a PMU reset, which didn't change anything. Do I need to replace BOTH fans? I have researched it, and it seems like I could replace them if I had to.
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Jun 28, 2014
My Macbook Air has suddenly decided not to turn. I have tried the rebook using the left hand side keys 'shift/control/option & power' but still nothing happens. Every now and again when I try turning it on using the power button the fan turns on and is really loud?
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Jul 23, 2010
I have a MBP 13" 2.66ghz, 4GB Ram, 320GB HDD. I used bootcamp and setup the drives 150~ for each partition. I installed Windows 7 64bit for some reason when its loading I sit at the Welcome screen for a unusually long time. Several older laptops can bootup (timing past the black windows logo) almost twice as fast. One of the older laptops I am talking about is 2.0ghz core 2 duo. My Macbook air 2.2ghz loaded 2x as fast I know the SSD in the device should make it the same speed as my MBP, but why is the MBP so slow?
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Sep 27, 2009
I just received my new Mac Pro from apple on Saturday. This thing is a beast! I am planning on running apps from Final Cut Studio 3, Photoshop, After Effects, and others. 2.66 Quad/6GB RAM (OWC)/640GB HD/ATI 4870
I have a few questions.
1.) Is it normal for the Mac Pro's fans to make a lot of noise when you first start it up or wake it from sleep? My fans make a lot of noise for about 16 seconds or so.
2.) I am planning to put a second optical drive in it. Is there a way to eject only one tray at a time, or will it do both?
Now, I am selling my iMac for around $800 and I am looking at some upgrades:
An additional 21.5" Acer LCD display
A mini display port to dvi adapter
A LG blu ray burner
Two 1TB samsung internal HDs
A blu ray player (I do not have one yet)
Elgato Eye TV hybrid
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Jun 19, 2014
Just got my Macbook air and it's making loud fan noises after I use it for a long time. Is there anything I could do to prevent that. Or should I be worried? just want to be careful with my computer
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Sep 16, 2008
Had been running my boot-camp Windows XP on my MBA using VMWare Fusion. A new version just got released, and I quickly upgraded.
After the upgrade, VM boot up takes for ever. Even after that, the performance is too poor. I tried uninstalling and re-installing VMWare tools, but the install doesn't complete.
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Jun 7, 2009
I am currently in the process of making the switch from MS Office to iWork as I got sick of all the bugs that Microsoft refuses to address. Anyway, iWork is great, I only use pages, and it is more than sufficient for my work. Only problem is, it takes forever to load?! After a cold reboot, it can take up to 20secs, even after that, if I quit out of it, open another program and go back to pages, it takes around 10secs to open. Is this the same for everyone? I would have thought...
1. Being a mac application
2. Being quite light compared to MS Word
3. Running it on a 4 month old mac book
4. Only running 1 & 2 other applications at the same time
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Aug 9, 2009
Im downloading 2 torrents with Vuze, safari is playing youtube vids but somethings eating up my memory....
Memory:
Wired: 560 mb
Active: 1.2 gb
Inactive: 1.99 gb
Free: 12 MB
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Mar 24, 2012
I was out of town so this description was second hand but the computer has been running a little weird for a while. When I have too many apps open or on a website that has a lot going on...the computer starts revving up until I quit out of everything and let it slow down. I guess while I was gone, this happened but nobody quit out the apps and it eventually turned the screen black. When I tried restarting it sounds like the computer is working but the screen is black so I can't see if it is booting up or not. I took the monitor into the apple store yesterday and it started up right away for them. It's a cinema 23" I think.
Info:
Power Mac G5 (Late 2005), Mac OS X (10.5.8)
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Mar 14, 2009
When i hit my desktop (after log in) it takes at least 2 minutes to become fully functional. It seems like its struggling. I hit the finder icon in my dock, or the firefox icon, and they just bounce... and bounce... and bounce.....
Then, the system sort of sorts itself out. It works fine. From then on my system is screamingly fast.
What the hell is the problem? Ive repaired disk permissions, and only have two log in items!
Running Unibody Macbook pro 2.53GHZ, 4GB Ram.
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Sep 26, 2010
I am so upset right now, this is my 2nd macbook with this problem. I just got this macbook yesterday and the hard drive is making a clicking noise, but it isn't a click....click...click... like a lot of people have had, it's actually more of a quick series of clicks every few seconds, almost like the hard drive is shaking. It goes away for a bit when I am typing, like right now, but after I stop it comes right back.
Also the fan is pretty loud, considering I haven't put anything on the computer yet.. I've already been to the genius bar and all they did was give me a new, worse macbook, so there is no way I'm going back. Are there any fixes for a noisy hard drive aside from voiding my warranty and putting my own in? If it is normal, I might just invest in a good pair on noise cancelling head phones... Thanks!
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