Why is the fan in my iMac running so much after Mountain Lion update?

For some reason, I seem to notice the fan on my 4 year old iMac running constantly, even with very few processes running (only Mail and Safari) after the upgrade to Mountain Lion. Anyone else have this problem? Anyone have a solution?

Sorry, guys (or girls), but NONE of this worked. I shut down, pulled the plug, restarted, Zapped the VRAM, restarted, several times...I mean, at least 4. There were NO major processes going on according the Activity Monitor. And with only Mail open, the fan began to run at high RPM (HD fan at 1486, CPU fan at 3896, CPU temp 41, CPU heatsink temp 41, GPU Diode temp 95, GPU Heatsink temp 90) almost immediately...and it has yet to go off. I suspect it won't do so until I leave it alone and it "sleeps" for a while. I have read that other people have this problem too, and it clearly is related to something in Mountain Lion, since that was the triggering event. I believe Apple must be advised that this is a software glitch, and they should work on getting a patch out to us.
Any more advice? I'd love to hear it.

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The fan on my imac runs fast and doesn't stop.

The fan on my imac runs fast and doesn't stop. I have to shut down the computer to get it to stop.
Why is it doing that and how do i stop it?

Reset the SMC using the directions below:
SMC RESET
Shut down the computer.
Unplug the computer's power cord and all peripherals.
Press and hold the power button for 5 seconds.
Release the power button.
Attach the computers power cable.
Press the power button to turn on the computer.
PRAM RESET
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

Why is the fan noisy on iMac? And how do I stop the noise?

Why is the fan noisy on iMac monitor and how do I rectify the problem?

Please do 2-3 SMC resets. If you don't know how please click Intel iMac SMC and PRAM resets for instructions.

HT204380 Facetime Activation: Could not verify the email address. Please re-enter and try again. Tried so many times,even changed my appe ID and purchased a new facetime for iMac running 10.8.4 Mountain Lion,yet still same outcome. Can somebody help me?

Facetime Activation: Could not verify the email address. Please re-enter and try again. Tried so many times,even changed my appe ID and purchased a new facetime for iMac running 10.8.4 Mountain Lion,yet still same outcome. Can somebody help me?

I have the same problem. FaceTime works fine on my iMac but when trying to use FaceTime on my Macbook Air, I have the same issue you describe.

The fan on my iMac runs on and off

It has been a while now and i didn't really think much of it but the fan on my imac keeps running really loudly on and off. i don't really know much of the terms people were using while reading other discussions but i want this noise to stop!! please help me!

When you close the applications does the fan slow after a few minutes or keep on sounding loud? If it quietens down then one of your aplications is is working hard and the fan is keeping things cool, if the noise does not stop then you could have a hardware fault.
Try resetting the Pram and SMC, link is to the SMC reset and the page has information on a link to teh PRAM info.
http://support.apple.com/kb/ht3964
After that I think you will need some local advice, perhaps an Apple store.

Missing the Message App after Mountain Lion Update

My Macbook Pro totally crashed after the Mountain Lion update, and a wonderful tech support lady at Apple walked me though hours of restoring it. However, now that it is working fine and all programs re-installed, I noticed that the Message app is missing. I really like this app and want it back. I paid for the OS and think I should get everything I had before, plus the update. I shouldn't lose a program in the update, should I? I've read through all the other message boards and can find only general suggestions to search in the spotlight (which I did to no avail), and I have searched for a third-party download. After the trouble I've had, I really just want the program back from Apple. HELP!

If it did not get reinstalled for some reason, then you will need to reinstall. See the following. You can avoid this if you have a prior backup.
Reinstalling Lion/Mountain Lion Without Erasing the Drive
Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the main menu.
Reinstall Lion/Mountain Lion: Select Reinstall Lion/Mountain Lion and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

IMac running very hot on Mountain Lion

My iMac cores are running between 67 and 83 degrees celsius. I am running Firefox and iMovie is analysing 4 minutes worth of video for stabilization. I know this is a common problem, but does anyone know of a coming solution?

The fans are working fine, I dread to think what the temp would be without them. It means that my once "silent" iMac now has fans running most of the time, this means it isn't silent anymore and I do a lot of recording. It's pretty much why I bought the iMac.
I'm hoping Apple fix this issue.

Macbook running slow after mountain lion update

why? i have 2 gb of RAM, that should be more than enough, right?
firefox is running slow, everything is freezing. i have barely used any of my hard drive space with it being at 225.61 gb free out of 249.2 gb.
its really frustrating.....

Two gb is the bare minimum for running Mountain Lion.
The model 7,1 (Mid 2010, White Unibody) can use 8gb of 204 pin 1066mhz PC3-8500 RAM
These are good online stores for Mac compatible RAM
OWC http://eshop.macsales.com/shop/memory/Apple_MacBook_MacBook_Pro/Upgrade/DDR3_Whi te - They offer Mac tested RAM at very good prices.
Crucial Memory http://www.crucial.com/ - good place to buy RAM from all over the world. They also have an excellent memory selector that allows you to choose memory based on your computer's model
Data Memory Systems http://www.datamemorysystems.com/apple-memory.asp - another good, cheap place to buying RAM if you live in the U.S.
Here are video instructions on replacing the RAM on the White Unibody.
http://eshop.macsales.com/installvideos/macbook_13_09_unibody_mem/
If you don’t have the tools to open up the MacBook OWC has a set for $5.
http://eshop.macsales.com/item/OWC/TOOLKITMHD/

Why does Time Machine forget "everything" after Mountain Lion update?

After updating to Mountain Lion (from Snow Leopard), I fired up my trusty external hard drive which contains my Time Machine backups (and nothing else) - of course I had run a backup right before upgrading to be sure. Two things are deeply disturbing: 1) The drive keeps on "rattling" as if a process is constantly reading or writing to it - even with Time Machine "OFF". Why? I (tried to) explicitly disable(d) Spotlight searching that drive, and nothing else should be accessing it! (I wish there was a way to simply turn Spotlight OFF for a while - I suspect it of a lot of crashes I experience).
Anyway, even more disturbing: Opening the System Preference Panel and sliding Time Machine to "On", it claims there is NO backup at all! Oldest backup: "NONE". Latest backup: "NONE". This is B.S.! BTW, opening the "Time Machine" app proper shows all the recent backups, so they are still there. So why doesn't the Time Machine Preference Panel not recognize them? Under these circumstances, is it safe to enable backups??? I am very afraid that if I let Time Machine proceed, it will try to create a full new backup, perhaps overriding all the snapshots from the past that are still stored on that disk. For one, even at 1 TB, my disk is not big enough to take another full backup on top of what's already stored on there. Any advice (other than "buy another hard disk just to be safe")?
O.k., I admit, so far I'm more upset with Mountain Lion than impressed.

Dear Pondini,
I am grateful for your advice and encouraging words, but I am (and remain) at my wit's ends as far as Time Machine is concerned. While I'm sure 99.99% of Mac users have no problem, there must be SOMETHING idiosyncratic about my own setup that has consistently crashed TM in the past, and now (after upgrading to Mountain Lion), it simply refuses to work EVER. Mind you, I'm NOT a "hacker" who installs non-standard software or likes to poke around in the Kernel.
Below is a shortened version of the Console output during my latest attempt - after 3 tries (after running disk utility to repair my permissions and check the hard drive), it never makes it beyond about 4 Gb before crashing. (And, what's worse, if I don't immediately react, TM very often crashes the whole computer to the point where NOTHING works anymore - requiring a restart. Even with Mountain Lion).
Thanks for any offer of help from anyone... SK
THIS WAS RIGHT BEFORE I TRIED TO START THE BACKUP
7/30/12 12:42:46.697 PM WindowServer[73]: [cps/setfront] Failed setting the front application to Finder, psn 0x0-0xc00c, securitySessionID=0x186a4, err=-13066 _
7/30/12 12:46:53.815 PM UserEventAgent[180]: com.apple.TMLaunchAgent disabled
NONE OF THE ABOVE WAS IN RESPONSE TO ANYTHING I DID! BUT MAYBE A CLUE?
ANYWAY, HERE GOES (with many repetitive lines removed - indicated by gaps):
7/30/12 12:48:52.885 PM com.apple.backupd[320]: Starting manual backup
7/30/12 12:48:53.475 PM com.apple.backupd[320]: Backing up to: /Volumes/TimeShare/Backups.backupdb
7/30/12 12:48:55.101 PM com.apple.backupd[320]: Event store UUIDs don't match for volume: Macintosh HD
7/30/12 12:48:55.799 PM com.apple.backupd[320]: Deep event scan at path:/ reason:must scan subdirs|new event db|
7/30/12 12:49:20.607 PM com.apple.launchd.peruser.501[156]: (com.apple.KerberosHelper.LKDCHelper[212]) Exited with code: 1
7/30/12 12:54:19.579 PM com.apple.backupd[320]: Finished scan
7/30/12 12:59:57.836 PM com.apple.backupd[320]: Found 470214 files (18.15 GB) needing backup
7/30/12 12:59:58.422 PM com.apple.backupd[320]: 24.03 GB required (including padding), 312.52 GB available
7/30/12 1:05:28.000 PM kernel[0]: disk1s2: I/O error.
7/30/12 1:05:28.000 PM kernel[0]: disk1s2: I/O error.
7/30/12 1:05:28.000 PM kernel[0]: jnl: disk1s2: do_jnl_io: strategy err 0x5
7/30/12 1:05:28.000 PM kernel[0]: jnl: disk1s2: write_journal_header: error writing the journal header!
7/30/12 1:05:28.000 PM kernel[0]: disk1s2: I/O error.
7/30/12 1:05:28.693 PM com.apple.backupd[320]: Error (256): fetching properties: Error Domain=NSCocoaErrorDomain Code=256 "The file “Credits.rtf” couldn’t be opened." UserInfo=0x7f8b749355c0 {NSURL=file://localhost/Volumes/TimeShare/Backups.backupdb/kuhn%E2%80%99s%20Mac Book%20Pro/2012-07-26-114729/Macintosh%20HD/Applications/Preview.app/Contents/Re sources/zh_TW.lproj/Credits.rtf, NSFilePath=/Volumes/TimeShare/Backups.backupdb/kuhn’s MacBook Pro/2012-07-26-114729/Macintosh HD/Applications/Preview.app/Contents/Resources/zh_TW.lproj/Credits.rtf, NSUnderlyingError=0x7f8b7493fff0 "The operation couldn’t be completed. Input/output error"}
7/30/12 1:05:28.694 PM com.apple.backupd[320]: Error: (-50) SrcErr:NO Copying /Applications/Preview.app/Contents/Resources/zh_TW.lproj/Credits.rtf to /Volumes/TimeShare/Backups.backupdb/kuhn’s MacBook Pro/2012-07-30-124855.inProgress/A9556B25-47FE-4D1F-A2C9-BF18EEF78898/Macintosh HD/Applications/Preview.app/Contents/Resources/zh_TW.lproj
7/30/12 1:05:28.000 PM kernel[0]: disk1s2: I/O error.
7/30/12 1:05:30.000 PM kernel[0]: disk1s2: I/O error.
7/30/12 1:05:30.341 PM com.apple.backupd[320]: Error writing to backup log. NSFileHandleOperationException:*** -[NSConcreteFileHandle writeData:]: Invalid argument
7/30/12 1:05:30.341 PM com.apple.backupd[320]: Error: (-50) SrcErr:NO Copying /Applications/Preview.app/Contents/version.plist to /Volumes/TimeShare/Backups.backupdb/kuhn’s MacBook Pro/2012-07-30-124855.inProgress/A9556B25-47FE-4D1F-A2C9-BF18EEF78898/Macintosh HD/Applications/Preview.app/Contents
7/30/12 1:05:30.341 PM com.apple.backupd[320]: Error writing to backup log. NSFileHandleOperationException:*** -[NSConcreteFileHandle writeData:]: Invalid argument
7/30/12 1:05:30.341 PM com.apple.backupd[320]: Error: (-50) SrcErr:NO Copying /Applications/Preview.app/Contents/XPCServices to /Volumes/TimeShare/Backups.backupdb/kuhn’s MacBook Pro/2012-07-30-124855.inProgress/A9556B25-47FE-4D1F-A2C9-BF18EEF78898/Macintosh HD/Applications/Preview.app/Contents
7/30/12 1:05:30.381 PM com.apple.backupd[320]: Stopping backup.
7/30/12 1:05:30.381 PM com.apple.backupd[320]: Error writing to backup log. NSFileHandleOperationException:*** -[NSConcreteFileHandle writeData:]: Invalid argument
7/30/12 1:05:30.381 PM com.apple.backupd[320]: Error: (-8062) SrcErr:NO Copying /Applications/Preview.app/Contents/XPCServices/com.apple.Preview.TrustedBookmar ksService.xpc/Contents/_CodeSignature/CodeResources to (null)
7/30/12 1:05:30.385 PM com.apple.backupd[320]: Error writing to backup log. NSFileHandleOperationException:*** -[NSConcreteFileHandle writeData:]: Invalid argument
7/30/12 1:05:30.386 PM com.apple.backupd[320]: Error writing to backup log. NSFileHandleOperationException:*** -[NSConcreteFileHandle writeData:]: Invalid argument
7/30/12 1:05:30.386 PM com.apple.backupd[320]: Copied 96604 files (2.26 GB) from volume Macintosh HD.
7/30/12 1:05:30.386 PM com.apple.backupd[320]: Error writing to backup log. NSFileHandleOperationException:*** -[NSConcreteFileHandle writeData:]: Invalid argument
7/30/12 1:05:30.387 PM com.apple.backupd[320]: Copy stage failed with error:11
7/30/12 1:05:30.389 PM com.apple.backupd[320]: Error writing to backup log. NSFileHandleOperationException:*** -[NSConcreteFileHandle writeData:]: Invalid argument
7/30/12 1:05:30.000 PM kernel[0]: disk1s2: I/O error.
7/30/12 1:05:30.464 PM com.apple.backupd[320]: Error: (5) getxattr for key:com.apple.backupd.SnapshotState path:/Volumes/TimeShare/Backups.backupdb/kuhn‚Äôs MacBook Pro/2011-06-14-140802
7/30/12 1:05:30.000 PM kernel[0]: disk1s2: I/O error.
7/30/12 1:05:31.178 PM com.apple.backupd[320]: Error: (5) getxattr for key:com.apple.backupd.SnapshotState path:/Volumes/TimeShare/Backups.backupdb/kuhn‚Äôs MacBook Pro/2012-07-26-114729
7/30/12 1:05:31.000 PM kernel[0]: disk1s2: I/O error.
7/30/12 1:05:31.248 PM com.apple.backupd[320]: Error: (22) setxattr for key:com.apple.backupd.HostUUID path:/Volumes/TimeShare/Backups.backupdb/kuhn‚Äôs MacBook Pro size:37
7/30/12 1:05:41.526 PM com.apple.backupd[320]: Backup failed with error: 11
7/30/12 1:09:42.396 PM mtmfs[37]: filesystem unmount attempted from stopFS
7/30/12 1:09:42.557 PM mtmfs[37]: unmount failed for /Volumes/MobileBackups
NOTE THE FAILURE TO UNMOUNT
7/30/12 1:10:02.499 PM fseventsd[48]: disk logger: failed to open output file /Volumes/TimeShare/.fseventsd/636573369d318daf (Invalid argument). mount point /Volumes/TimeShare/.fseventsd
7/30/12 1:10:04.000 PM kernel[0]: disk1s2: I/O error.
HERE I USED "FORCE EJECT"
7/30/12 1:10:04.799 PM fseventsd[48]: disk logger: failed to open output file /Volumes/TimeShare/.fseventsd/636573369d318daf (Invalid argument). mount point /Volumes/TimeShare/.fseventsd
7/30/12 1:10:05.000 PM kernel[0]: jnl: disk1s2: close: journal 0xffffff8042d1bcc0, is invalid. aborting outstanding transactions

Why do gestures stop working after Mountain Lion update?

I've just installed Mountain Lion on my MBP, and soon after a reboot, gestures stop working.
Rebooting fixes this, at least temporarily. But soon afterwards I can't switch between screens with three finger swipe etc.
Yes, gestures are enabled in preferences.
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Having same issue with iMac and Magic Mouse.
I found that Mission Control stopped working as well (even with the App shortcut in Applications) and as such found a quicker workaround than login / logout. Open Terminal and type:
killall Dock
This will restart the Dock and Mission Control etc and seems to restore the gestures.
Cheers
Phil

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Why is the fan in my iMac running so much after Mountain Lion update?

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