Forum Discussion
10 years ago
I'm having this same problem and I have an old Mac (21.5 iMac, late 2009) with an ATI Radeon HD 4670 256 MB graphics card. This is a new problem that happened after Yosemite. I had it working for awhile, but now it's not working again and nothing seems to be working. Anyone else running a late 2009 iMac with Yosemite having this problem? I've been scouring forums but haven't been able to find anything that's helped.