Yosemite Upgrade Performance Loss Fix - Mac OSX
How to fix performance loss for older mac's that have been upgraded to OSX Yosemite.
Most noticeably, video lagging which this will mostly fix, but also iPhotos new app Photo Agent (iCloud) take note that it runs and uses far to much CPU in the background. For that I am still and searching for a fix.
Post comments if you find a way out!