Upgraded from Snow Leopard to OS X Mountain Lion yesterday and Having god awful performance issues. the wheel of death is always running.
After Upgrading everything runs so slow. every app is very slow. I have deleted apps I dont need, Ran a disk Utility verify and repair, turned off all notifications.
reset memory by holding down apple, function p and r keys.
what else can i do.
MacBook Pro, OS X Mountain Lion, running very slow
I have a new MacBook Air and upgraded too to OS X Mountain Lion and have the same problem!
Having same issue with MacbookPro 5,5
System is CRAWLING.
I also have a new Macbook Air (from last summer), and I was actually impressed at the speed of everyday actions preformed on the OSX Lion system. Now I am quite surprised by the slow speed performance (if you can even call it "performance") of the OSX Mountain Lion system. I don't know what it is, but I hope that if we increase the activity (discussions, replies, views) on this issue, then they can fix it.
Hi, I reset the PRAM following these instructions http://support.apple.com/kb/HT1379 and everything seems to be working as it should.
Good Luck
This works until the screensaver goes on, then its slow as a snail again. 😟 I have to re-boot a lot.
Look at Thomas A Reed's Understanding Upgrade Nightmares article http://www.reedcorner.net/understanding-upgrade-nightmares/ and make sure all apps are compatible with Mountain Lion by using www.roaringapps.com. Using both of these you should be able to diagnose your individual problem and get i fixed.
Mountain Lion extremly slow on Macbook Pro
