I'm on an early 2015 MacBook Pro running the latest High Sierra (10.13.1).
This started about a week ago with one or two apps (I believe I noticed it with Trello and Slack first, and assumed it was an Electron issue) but now about half of the apps in my /Applications folder are displaying generic App icons rather than their own specific icon, including official Apple apps like Pages, App Store, etc. The apps all run properly, but are displayed in the dock and Cmd+Tab switcher with the same generic icon which is making things difficult.
Has anyone seen this behavior before, knows how to resolve it, and maybe most importantly to me, have any idea what causes it?
EDIT: Some more info. A reboot seems to make this much better, but still not entirely right. For now, immediately post-reboot, all the dock icons and /Application icons in Finder appear correct, but there are still places where the generic icon appears for some apps, for example in Spotlight on the far right, Finder still shows the generic icon, while App Store (and all the others I tried so far) show the correct icon. Still very curious if anyone has ideas as to the cause of this, I'm not familiar at all with how macOS finds and displays these icons across different contexts.
This started about a week ago with one or two apps (I believe I noticed it with Trello and Slack first, and assumed it was an Electron issue) but now about half of the apps in my /Applications folder are displaying generic App icons rather than their own specific icon, including official Apple apps like Pages, App Store, etc. The apps all run properly, but are displayed in the dock and Cmd+Tab switcher with the same generic icon which is making things difficult.
Has anyone seen this behavior before, knows how to resolve it, and maybe most importantly to me, have any idea what causes it?


EDIT: Some more info. A reboot seems to make this much better, but still not entirely right. For now, immediately post-reboot, all the dock icons and /Application icons in Finder appear correct, but there are still places where the generic icon appears for some apps, for example in Spotlight on the far right, Finder still shows the generic icon, while App Store (and all the others I tried so far) show the correct icon. Still very curious if anyone has ideas as to the cause of this, I'm not familiar at all with how macOS finds and displays these icons across different contexts.


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