IMac :: USB Energy Consumption Error
May 12, 2010
Has anyone else experienced a recurring error stating that the energy consumption of a USB peripheral is too high? I figured it to be one of those no brainer problems, but via process of elimination (plugging and unplugging my keyboard, mouse, and disabling the bluetooth unit) I have been unable to discontinue the message.
Furthermore, after looking through the system profiler, the only usb port that this consuming much of any energy is this isight port but it is still consuming only its allotted 500 mA. I ran the Apple Hardware tests twice and have not discovered any hardware failure. I'm now at a loss with an error message that pops up over the top of the desktop every 30 seconds or so. I'm running 10.6.3 on a 2.4 Ghz Core 2 Duo Imac.
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Oct 24, 2010
I just found this environmental report for the 27" iMac's on Apple's web site, which lists the amount of power they use when off/asleep/idle.
There doesn't seem to be a similar document for the Late 2006 iMac's. I'm just wondering if anybody knows the power consumption stats for the older iMac's (the 20" model in particular) - I'm interested to now how the newer models compare as I'll be buying one soon.
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Nov 19, 2009
I'm considering to buy a new iMac (21,5"/nvidia or ati) and I'm wondering if someone has already measured the actual power consumption. In it's environmental paper, Apple documents that it uses less than 2W in sleep mode and 37,5 W with the display off. Did anyone try if this is also measured in real life? I may sound a bit paranoid, but half a year ago I bought a mac mini 2007 at a stock clearance, and I was shocked to find out that just the powerblock plugged in already consumes 8W, the mini itself in standby consumes 11W. Add to that a screen, external speakers and an external disk and the total standby power consumption of the lot is 25W. Terrible.
Besides the energy consumption, I'm also a bit disappointed with the speed of the mini, but that's probably largely due to the low RAM (1GB). So rather than going for the latest mini model, I'd like to go for the power of an iMac. But I would be really happy if someone could confirm the power consumption. Specifically I'm looking for power consumption
- In sleep mode
- While streaming itunes to an airport express, with the display off
(I assume the display goes to sleep automatically when streaming. Right?)
- While in normal, not too heavy operation (eg surfing, mailing & itunes)
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Dec 18, 2010
If I replace my mid-2007 iMac's internal HDD with an SSD, will Snow Leopard still present me with the "Put the hard disk(s) to sleep when possible" checkbox on the Energy Saver power settings screen? If so, do I tick it or not? I will still have an HDD for Time Machine connected via FW800.
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Sep 2, 2009
I have an issue where my iMac won't sleep automatically, via Energy Savings. I've checked Console.app and within the DATABASE SEARCHES > Console Messages, I keep getting a repeating message: 02/09/2009 08:33:23com.apple.launchd.peruser.501[200](com.seagate.notificationexec.plist) Throttling respawn: Will start in 10 seconds. I've searched my iMac, but cannot find any reference to this file. Can anyone advise how I can resolve the issue? (ie stop this reoccurring message)
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Jan 16, 2009
1 "Put the computer to sleep when it is inactive for.."
2 "Put display to sleep after..."
3 "Put Hard Disks to sleep when possible..."
I'm guessing that #1 won't spin down the Hard Disks unless #3 is checked? Is that right? I'm also guessing that if I'm downloading a file or securely deleting the trash my iMac won't go to sleep? The reason I ask is because it seems like if I'm deleting the trash and my display goes to sleep, when I come back to the computer i really don't see any progress. What options do you guys typically use? I keep my iMac on 24/7, but didn't know about the first sleep option.
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Aug 3, 2010
I just switched from a PC. All my backup (files, music, photos, etc) are stored onto a Windows-formatted HDNow i have error when i try to transfer them over
It gives me the error-36did a bit of research but none of the remedy worked (i.e. terminal>dos_clean)I have previously transferred files from the same external HD onto my macbook in which i purchased last year and don't recall having any problems. (although not all the files were transferred onto my macbook, only a few files in which i needed) What can be the alternatives for me to transfer all my files over onto my imac without having the reformat my external HD?
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Apr 4, 2010
I want to see what programs or files are taking up the most hard drive space.
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Apr 2, 2012
I use iTunes primarily as a Home Sharing home-base to stream my TV Shows and Movies to Apple TVs in my home. As a result, it (as well as the iMac) are on 24/7 with the exception of a daily scheduled task which quits and reopens iTunes to sync unwatched media to my iOS devices at 4:30AM.
I have noticed several things with iTunes 10.6 which I have documented in other questions here on the forums (long periods of unresponsiveness, the inability to scrub videos), but this issue may be just as significant and could be a root cause in my other problems. This particular question deals with RAM consumption. I have noticed for years that iTunes is a memory hog, so you won't find me shocked there, but what has shocked me is how the amount of RAM iTunes consumes has risen with the amount of RAM I've installed. I currently use an iMac (mid-2010) with a quad i7 and 16GB of RAM.
I have noticed lately that upon opening iTunes 10.6.1 (and 10.6 before it) that iTunes immediately captures about 250MB of RAM. While I have plenty to spare in comparison, I've noticed that the amount of RAM it consumes swells considerably throughout the day. For example, my iTunes is completely idle right now - no devices are connected, no media is streaming or caching, no store purchases are downloading, and iTunes Match/Genius is not actively scanning anything - but my iTunes shows 605MB of RAM. When playing an m4v file converted from mp4 (so we're talking maybe a 200MB media file - not an MKV convert or anything in 1080p), I've noticed iTunes balloon to 900+MB of RAM. If I quit the application and open it again, it immediately snatches up that 250MB or so of RAM, then balloons within minutes.
So while I expect iTunes to consume RAM, as it is a very resource-heavy and busy media center hub, I am surprised by the amount of RAM being consumed here and was wondering if anyone might be able to clarify whether I should consider this a "problem" or just iTunes being iTunes; and if it isn't a problem, are there still any suggestions toward how I could minimize RAM consumption? I realize that I have RAM to spare, but when I get into video conversions, music playback, and work on this computer (all the while my wife is streaming a video across the house on an Apple TV), I do want to make sure I'm not wasting memory on an application that might be ballooning unnecessarily (it is, after all, 6X the consumption of the next app in line).
Just for those who might be wondering what I've already tried, I've worked on several quick fix ideas to help remedy the situation (and hoped they would fix the other issues I've experienced with iTunes 10.6): I've rebuilt the library by opening a new library and importing from my previous iTunes LIbrary file; I've created a new library, dragged any media to it, and tried to play it; I've run iTunes in 32-bit mode. None of these has resolved the issue. I have also attempted to run these files from a new user account (with a new library or with the existing library), and have tried them from an external troubleshooting drive which is also running Lion 10.7.3 and iTunes 10.6.1.
Info:
iMac (27-inch Mid 2010), Mac OS X (10.7.3)
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Nov 15, 2010
Is it normal for SSDs to use the same or more power as a HD?
SSD
An OWC Mercury Exreme Pro 40GB SSD uses 2.2W-2.5W when active.
A WD SiliconEdge Blue 64GB SSD uses 2W when reading and 3.5W when writing.
An OCZ VERTEX 2 40GB SSD uses 2W when in operation.
HD
A WD Scorpio Blue (5400rpm, 2.5") 250GB HD uses 2.5W when writing/reading.
A WD Scorpio Black (7200rpm, 2.5") 250GB HD uses 2.5W when writing/reading.
A Hitachi Travelstar 5K750 (5400rpm, 2.5") 500GB HD uses 1.4W when writing/reading.
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May 25, 2008
When i want to use mp with simple task . eg. iTunes , web browsing , e-mail If i select 1CPU or 4CPU option. Can it reduce my Mac pro power consumption.
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Nov 6, 2008
I have a pioneer 111d drive that is in a external enclosure,that I don't use anymore. I would like to put it in my mac pro. How much current do the drives draw when in idle or stand by mode. The only reason I ask. Is because, I have no need for a mac pro with two drives, as of now. I would be adding the second drive just because I can. I would pass on this if I new it was just sitting their wasting energy.
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Mar 30, 2010
Two quick questions:
- Is it bad to have the keyboard backlight always on? Will it somehow burn out the little lights?
- How much less battery power will I lose if I have the backlight always on? (I use Labtick).
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Jul 23, 2010
I've noticed that my macbook pro has been using a lot of RAM. I haven't really witnessed a slowdown on my computer b/c of any sort of shortage of RAM but I was just curious if this was typical (since this is my first mac). I have 4 GB of RAM and I often find myself with around 1-1.5 GB of free + inactive RAM. I had a linux system with 3 GB RAM before and it used between 1-1.8 GB of RAM and it seems like this system is using around 2.5-3 GB (active + wired). However, various OS X laptops in the past have functioned really well in the past with 2 GB and even 1 GB of RAM right? Is OS X just putting more processes in my RAM to speed up my system because more RAM is available OR does snow leopard just have high memory consumption?
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Nov 21, 2010
Getting fustrated with my Macbook Pro 15''. Could never get battery to last more than 5-6 hours. This is the MAX i can achieve, with great pains to enhance battery life.
Argh, what's wrong with my Macbook Pro?
Check out the amperage drain. At this rate the Macbook Pro wouldn't last more than 5 hours. This is with half brightness, only finder and Chrome open, and the battery recently calibrated.
The amperage drain increases to -1400+ when i have more tabs open, and a few other apps.
However there was this ONE RARE OCCASION, where my Macbook Pro would only drain between -700 to -800 amperage. This was in normal usage and the battery easily lasted closer to 8 hours. But somehow, i can never replicate this anymore!
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Sep 9, 2009
I have a unibody macbook pro 15 inch, 2.8 Ghz, 4gb ram, 500Gb HDD. There are various display settings like 1440x900, 1344x840, 1280x800, 1024x768 and so on till 640x480 (descending order). Will the battery consumption vary at different display settings? If so, how much of a difference will it make?
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Nov 22, 2009
so this is the issue. I've always used istat menus to monitor my computer usage i.e. RAM, CPU, Fans, power, etc. With my old 2008 Mac Pro istat used to display how much power it was using however with my 2009 Mac Pro it doesn't. It displays 0 Watts throughout. Any ideas on how to solve this. I'm really curious with regard to how much power this system uses.
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Jun 30, 2010
I haven't been using it much after Safari 5 (just because Firefox takes forever to open compared to Chome and Safari) but I think that since 3.6.4 or 3.6.5 it constantly hogs my system using 80%-90% of my CPU according to Activity Monitor. RAM usage is similar to other browsers.
Yeah I know I have an old Mac (Mini Core Duo 1.66) but right now for example Safari 5 with 5 tabs is using 5% and Chome is at 4.5%. I know it's not the extensions because I downloaded the 4.0 beta which disabled most of them (just to test it) and the same thing happened. Btw I'm using 10.6.4.
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Jul 23, 2010
Is there a software to monitor the Bandwidth consumption for Mac.
I use Bandwidth Monitor Pro for Windows and its good. But I guess they do not have it Mac.
Activity Monitor does a good job of showing the current speed and the total amount of data downloaded / uploaded, but thats just good for one session.
I am looking for some software that helps me view this information over a period of time.
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Nov 7, 2010
we all know flash is a battery eater so to prevent this is install click to flash then it will indicate every pages that runs flash has this word "flash" on webpage which is good thing.now, i am a netflix subscriber and to watch movies you have to install microsoft silverlight..i dont have any choice to install it. if i open a webpage for example cnn.com yahoo.com etc.. how can i determine that those sites are using silverlight?i believe silverlight will cause battery consumption like flash right?
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Feb 26, 2009
How to calculate the regular MacBook power consumption if it is left on lowest screen brightness for about 12 hours, plugged in, with just a browser running Gmail? The following is the System Profiler->Power Information that pertains to this topic:
Battery Information:
Model Information:
Serial Number:DP-xxxxxxx-xxxx-xxxx
Manufacturer:DP
Device name:xxxxxxx
Pack Lot Code:0002
PCB Lot Code:0000
Firmware Version:0110
Hardware Revision:0500
Cell Revision:0102
Charge Information:
Charge remaining (mAh):4831
Fully charged:Yes
Charging:No
Full charge capacity (mAh):4831
Health Information:
Cycle count:188
Condition:Good
Battery Installed:Yes
Amperage (mA):147
Voltage (mV):12604
System Power Settings:
AC Power:
System Sleep Timer (Minutes):0
Disk Sleep Timer (Minutes):10
Display Sleep Timer (Minutes):20
Automatic Restart On Power Loss:No
Wake On AC Change:No
Wake On Clamshell Open:Yes
Wake On LAN:Yes
Display Sleep Uses Dim:Yes
Battery Power:
System Sleep Timer (Minutes):5
Disk Sleep Timer (Minutes):10
Display Sleep Timer (Minutes):1
Wake On AC Change:No
Wake On Clamshell Open:Yes
Display Sleep Uses Dim:Yes
Reduce Brightness:Yes
Hardware Configuration:
UPS Installed:No
AC Charger Information:
Connected:Yes
Charging:No
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Nov 26, 2009
I am planning on replacing my Canon printer right now, because it has some issues. There are two printers that I'm interested in right now. It's either the HP Photosmart Premium or the Epson Artisan 810. Which one do you think is better? In general, which manufacturer is more reliable and more conservative in terms of ink consumption?
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Mar 11, 2010
So I have a late 2008 MBP and the battery is draining way faster than it should. Coconut battery says that my battery capacity is at 93% and it only has 73 cycles but the battery has only been lasting 3 hours at best with a full charge, but most typically, it only lasts 2 hours while using the 9400m GPU and at idle. I have reset the battery per apple's instructions 2 times now and I have reset the SMC multiple times. this is what the system profiler says about my power capacity and consumption:
Model Information:
Serial Number:6N839TV313EB
Manufacturer:SMP
Device name:bq20z951
Pack Lot Code:0000
PCB Lot Code:0000
Firmware Version:002a
Hardware Revision:000a
Cell Revision:0100
Charge Information:
Charge remaining (mAh):3522
Fully charged:No
Charging:No
Full charge capacity (mAh):4226
Health Information:
Cycle count:72
Condition:Normal
Battery Installed:Yes
Amperage (mA):-1449
Voltage (mV):11830
This all happened out of nowhere one day, I used to get a solid 5 hours on each charge a month ago and now this.
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Jun 13, 2010
Is there a difference in using mbp with a headphone or built-in speakers in terms of battery consumption?
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Oct 15, 2009
as topic states, what do you think the difference in power consumption between 5400rpm and 7200 rpm?
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Aug 5, 2010
So I just got hold of a few of these new battery chargers from Apple and I'm just wondering if these are meant to stay plugged in the wall, even after the green light goes off. Does the light going off mean that the batteries will no longer draw power from the power outlet and that it is safe to assume power will continue to be consumed? Or is it preferred that I plug and unplug the charger only when needed to avoid any, unnecessary, extra power consumption?
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May 30, 2008
I am looking for a ups for my macpro so wanted to ask you guys how much energy the macpro consumes? I asked at the apple store and a tech guy told me the minimum a macpro (stock configuration) uses is 250watts and the maximum 350watts, can I trust these numbers?
I have the stock configuration with a geforce 8800 and added 4 more hard drives and another 8800, so I am guessing I will need an ups around 600 watts?
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Feb 25, 2009
well i just bought my new aluminum macbook and i want to get the most battery life possible..and i was wondering how to do that...i have turned my brightness to like 4 and by doing that i got 6hrs once and now im only getting 2:11...how is that possible and i just charged it!does it take time for the the hrs to go up after i just charged it or what i see is what i get??
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Mar 21, 2009
I'd like to set my mpb (early 2009) to "higher performance" for the power adaptor and "better battery life" while on the battery. Can someone confirm if this is possible? I can't seem to do this because when I change it on one power source it automatically changes it on the other power source. Is there something obvious I am missing - I have searched the forums in vain. (I have checked that I don't need any software updates).
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May 13, 2009
Apparently, Apple managed to restore the power optimization settings in the battery bar as they were removed in 10.5.6 (See picture).
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