Waiting for 3rd iMac
Here's my experience and thought on IR so far:
Received first iMac on 12/22. Machine had no major issues with IR or loud fans, but Target Display mode would not work. Apple sent a replacement and let me keep the current iMac until the new one arrived.
Received second iMac on 1/15. Immediately booted it up and connected to the first iMac to test that Target Display mode worked (and it did!). I left the machine in this configuration (first iMac as the main computer and the newest as the second monitor the first). After a few hours I moved to a new desktop work space by swiping and found finder and some other utilities burned into the newest iMac. That IR stayed on the screen for over an hour.
From there I took it off Target Display mode and let both machines run on their own. I did the IR test pattern on the newest one and left that up for 10 minutes, and sure enough, no issue.
Fast forward a week. IR suddenly shows up again. I do some more testing - IR is happening pretty frequently. What I realized at this time that the only thing that I was doing differently was having a second display connected to the iMac (at this point my TV). And since the issue only started when I was using the display in Target Display mode or with a second screen attached, I'm wondering if the issue is really GPU related and causing burn in.
I haven't had IR since I unplugged the TV from the iMac, but admittedly, I'm not really testing for IR at this point since I was told by Apple that if IR stays around for more than a few minutes its a problem.
Anyone else finding the same issues happening with dual displays? With the rMPBs having the same issue and same GPUs, this seems oddly coincidental.
Here's my experience and thought on IR so far:
Received first iMac on 12/22. Machine had no major issues with IR or loud fans, but Target Display mode would not work. Apple sent a replacement and let me keep the current iMac until the new one arrived.
Received second iMac on 1/15. Immediately booted it up and connected to the first iMac to test that Target Display mode worked (and it did!). I left the machine in this configuration (first iMac as the main computer and the newest as the second monitor the first). After a few hours I moved to a new desktop work space by swiping and found finder and some other utilities burned into the newest iMac. That IR stayed on the screen for over an hour.
From there I took it off Target Display mode and let both machines run on their own. I did the IR test pattern on the newest one and left that up for 10 minutes, and sure enough, no issue.
Fast forward a week. IR suddenly shows up again. I do some more testing - IR is happening pretty frequently. What I realized at this time that the only thing that I was doing differently was having a second display connected to the iMac (at this point my TV). And since the issue only started when I was using the display in Target Display mode or with a second screen attached, I'm wondering if the issue is really GPU related and causing burn in.
I haven't had IR since I unplugged the TV from the iMac, but admittedly, I'm not really testing for IR at this point since I was told by Apple that if IR stays around for more than a few minutes its a problem.
Anyone else finding the same issues happening with dual displays? With the rMPBs having the same issue and same GPUs, this seems oddly coincidental.