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Q: iMac 27" 5K Late 2015 screen artefacts on shutdown

Bit of an odd one - upgraded to Mac OS Sierra, all working fine. When I shut the iMac down, the whole screen displays weird artefacts  - (graphics glitch?), then shuts down fine. So not causing a problem, per se, but wondered if anyone else has had this issue?

iMac (Retina 5K, 27-inch, Late 2015), macOS Sierra (10.12)

Posted on Sep 27, 2016 1:25 AM

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Q: iMac 27" 5K Late 2015 screen artefacts on shutdown

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