I bought my 27" iMac (2.7 GHz Intel Core i5, 4GB RAM) maybe 6-7 months ago...and it has had NO problems. Even after updating to Lion. Smooth.
But after the most recent graphics firmware update (Feb 29) and software update (late Feb/ealry March 2012...can't remember exact date)...now my iMac is so sluggish! Running more than one application really makes my iMac run slow. And I'm not talking about Photoshop...I'm talking about Firefox, Safari, Mail, iTunes. Basic ones. Especially bad when I play video...very choppy.
Any clue what's going on? I ran Disk Utilitiy (all good, repaired permissions), Clean My Mac, CCleaner...all say good and healthy. So I am at a loss.
Any help would be greatly be appreciated. I'm still under warranty...but I don't think I need to bring it in do I?
Please read this whole message carefully, especially the warnings, before doing anything.
WARNING: The changes to your configuration suggested here should be regarded as provisional; they may not solve your problem, or they may remove functionality that you consider to be useful. If a third-party system modification that you want to keep is causing the problem, you’ll have to seek help from its developer.
WARNING: Back up all data if you haven’t already done so. Before proceeding, you must be sure you can restore your system to the state it’s in now, even if it becomes unbootable -- which might happen. If you’re not absolutely sure you can do that, STOP – DON’T CHANGE ANYTHING. If you’re dissatisfied with the results of the procedure suggested below, restore from your backup. I will not be responsible for the consequences, and I will not help, if you ignore this warning.
You should either update or uninstall the following system modification(s), if an update is available from the developer:
and definitely remove at least the following:
Juniper Network Connect
All of the latter must be removed completely, and (unless otherwise specified in this message) the only way to do that is to use the uninstallation tool provided, if any, or to follow the developer's instructions. In some cases it may be necessary to re-download or even reinstall the software in order to get rid of it. I can't be more specific, because I don't install such things myself.
WARNING: Trying to remove complex system modifications by hunting for files by name usually will not work and may make matters worse. If you can’t remove the modifications any other way, you’ll have to erase your boot volume and perform a clean reinstallation of the Mac OS.
I recommend that you never reinstall the modifications marked with a dagger (†) above, if any. If your problem is resolved after uninstalling all the above modifications and rebooting, but you still want to use some of those not marked with a dagger, you can experiment with putting them back, one at a time, testing carefully after each step. Keep in mind that system modifications may be incompatible with each other or with future Mac OS updates, so it may not be clear which one is at fault.
Never install any third-party software unless you're sure you know how to uninstall it; otherwise you may create problems that are very hard to solve.
If you still have problems after making the suggested changes and rebooting, post again. Remember: if you don’t like the results of this procedure, you can undo it by restoring from the last backup you made before you started.