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Message: <blockquote data-quote="peacockharris" data-source="post: 1919570" data-attributes="member: 415058">Well colour me confused about the possibility of reflowing the GPU. Despite the fact my searches of the issue (specifically with this model) were bringing up results related to this fix, I'm unable to find anyone having done it specifically on a late 2013 model (I'm only finding it done with 2009 and 2011 iMacs)As pointed out by another poster, the GPU in the late 2013 model is integrated with the logic board. Does that mean I can't even attempt it? Feeling pretty bummed, especially as it turns out I ideally need to access the computer so that I can update the OS to Mojave, and the file system to APFS. My newly purchased Mac Mini won't play ball with my Time Machine backups otherwise.</blockquote>