Q: 27" iMac (3.4 i7, Late 2012) screen burn-in Yosemite only
When Yosemite was released I jumped on downloading it. The first instant of heavy use I realized there was blue ghosting that occurred when the white space of a program was displayed for too long. I have known for awhile with the persistent burn-in issues that were prevalent with the late 2012 27" iMacs. I, for some reason, was one of the lucky ones that never had an issue. For the first year and a half my iMac was heavily used, 8-10 hours daily, with absolutely no burn-in. After the installation of Yosemite that changed. I would start to see faint blue burn-in after only an hour or so of use and would need to actively move screens or switch desktops within Mission Control to reduce the affect.
About a week ago I decided to test a theory. I reverted back to a TimeMachine backup right before I updated to Yosemite. Within that time I have disabled screen saver and display sleep and would keep open programs with large amounts of white space (Mail, Safari, etc.). There has been no visual sign of any burn-in. I have left the windows open for roughly 5-7 hours without any instance of the display sleeping.
Obviously, for many with Late 2012 27" iMacs who have had screen burn-in issues it has been a hardware issue. This is definitely a software problem within Yosemite. I have no idea if it is a problem within the Yosemite code itself or when I upgraded from Mavericks. I may take the testing further and whipe my drive and start fresh with Yosemite to see if I have an recurring issues. Not sure when I will get to that but once I do I will edit this post and add my findings.
Additional information:
No, I do not have AppleCare (however, that will be done for all future purchases)
It is not an issue reverting back to Mavericks for me. I am posting this to see if anyone else has seen this issue when switching to Yosemite.
Discussions would be great. Feel free to ask anything that I may have left out.
iMac, OS X Yosemite (10.10.1)
Posted on Jan 11, 2015 12:16 PM