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When running applications on the simulator with Xcode 9, I regularly experience a handful of visual glitches, which include red device identifier labels and content that duplicates itself and leaves pixel mess after it moves. I did not have these issues with Xcode 8.

red device identifier label

messy content

These occur regardless of the OS of the simulator, I replicated the issue with iOS 11 and 10.

This might be unrelated, but I use a legacy version of iClipboard (6.0.0) and a similar glitch persists inside the search bar sometimes.

iClipboard - glitch in search bar

What causes these glitches and what can I do to fix them?

Tamás Sengel
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  • Step one: file a bug report with Apple! – matt Oct 24 '17 at 21:53
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    Are you using macOS High Sierra? Apple has rewritten the Window Manager for the OS and this is supposedly causing these glitches. Maybe that's the issue here. I don't know if there is any fix yet. If the glitches are related to macOS High Sierra, downgrading to macOS Sierra would be one option (though not very efficient). – erik_m_martens Oct 24 '17 at 21:12
  • Is this related? https://stackoverflow.com/questions/46223236 – Pang Oct 30 '17 at 02:18
  • @Pang It is somewhat related, but the artifacts are different. – Tamás Sengel Oct 30 '17 at 08:59
  • I've seen this as well - also filed a bug with Apple. Hopefully goes away soon – jeanmw Nov 19 '17 at 05:59

2 Answers2

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Re-installing macOS High Sierra latest version (10.13.4 (17E202)) will solve this issue, i had similar issue with my Mac-book Pro.

Please be sure you are hard formatting and then re-installing the fresh OS.

bharat
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Try switching to the last Xcode. Xcode 11.5.0 is the latest current stable version.

Arunabh Das
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