I just posted a similar thread on the high sierra board, but I though I would post here to and see if anyone has seen this issue with their 2011 iMac (21.5").
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iMac intermittent screen corruption
- Thread starter Richdmoore
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Thanks. I am running two time machine backup drives (one usb & one time capsule. I was also making super duper backups, but since the switch to High Sierra I wasn't sure how safe it would be to clone to a hdd.
I am still hopeful it is a High Sierra bug, but preparing in case it is not.
I am still hopeful it is a High Sierra bug, but preparing in case it is not.
Not a High Sierra bug. I have a mid 2010 27" iMac and my machine does this all the time. Including kernal panics and lock ups for no reason. Over the Thanksgiving break I'm going to try and get mine fixed. I don't have the money for a new iMac so I'm going to fix mine. Seems to be a common problem with the 2010/2011 iMacs.
Well, I loaded the update to High Sierra, and am still getting intermittent graphics corruption. I am positive it is the hardware that is giving out.
The question now is should I take the iMac to apple (it is almost vintage, and will be classified as such any day), order a used replacement ($300+ when I looked) to install myself, or simply cut my losses and start looking for a new computer?
I have a copy of apple's hardware diagnostic test that I acquired, and it shows the graphics card as ok, so I am not sure if I would be wasting my time or not taking it into apple.
In addition to the failing graphics, the dvd drive has been inop for a few years. I currently use a USB bluray drive instead.
Right now the computer is still operable (with minor graphics issues) so I may be able to nurse this until the iMac/macbook pro/mac mini receive the next updates.
I am torn on what model computer to replace the iMac with as well.
The question now is should I take the iMac to apple (it is almost vintage, and will be classified as such any day), order a used replacement ($300+ when I looked) to install myself, or simply cut my losses and start looking for a new computer?
I have a copy of apple's hardware diagnostic test that I acquired, and it shows the graphics card as ok, so I am not sure if I would be wasting my time or not taking it into apple.
In addition to the failing graphics, the dvd drive has been inop for a few years. I currently use a USB bluray drive instead.
Right now the computer is still operable (with minor graphics issues) so I may be able to nurse this until the iMac/macbook pro/mac mini receive the next updates.
I am torn on what model computer to replace the iMac with as well.
I wouldn’t spend any money on a 6 year old pc myself it’s false economy, i’d get a new machine and sell the old one for parts.
Yep my G5 did exactly that. 2 weeks later entire display was corrupted. Graphics card was kaput.
Way to test is connect an external monitor, if it still does it then it's the graphics card, if it doesn't it's the connection to the screen.
Way to test is connect an external monitor, if it still does it then it's the graphics card, if it doesn't it's the connection to the screen.
I was able to test it on a 720p tv today, still had the weird squares on both displays. I'm pretty sure the graphics card is dying.
I was hoping to be able to pass the iMac on to other family members, but not if it has this issue. Now I need to hope that the computer lasts a bit longer to see if a Mac mini update, MacBook update, or iMac update occurs before this computer stops working completely.
I was hoping to be able to pass the iMac on to other family members, but not if it has this issue. Now I need to hope that the computer lasts a bit longer to see if a Mac mini update, MacBook update, or iMac update occurs before this computer stops working completely.