OSX Ui glitching. Desktop items dissapered, dock icons flicker black.
OSX Ui glitching. Desktop items dissapered, dock icons flicker black. Unable to read dropdown menus - Appreciate the help.
pic 1: http://i40.tinypic.com/103bhix.png
pic 2: http://i40.tinypic.com/293he1v.jpg
iMac 27" fall 2009
OS X Mountain Lion
Processor 2,66 GHz Intel Core i5
Memory 4 GB 1067 MHz DDR3
Graphics ATI Radeon HD 4850 512 MB