DammarVarnish wrote:
This is a really weird problem. Sometimes (no rhyme or reason as to when) a folder will show generic icons instead of the appropriate ones. When I move all the contents to a temporary folder, delete the original folder, recreate it, and move the files back, the proper icons are shown. Why on Earth could this be?
You can try relaunching the Finder on the fly and compare your results...
hold the Control Option key when clicking the Finder icon in the far left of the Dock>Relaunch
To trouble shoot further you can:
—SafeBoot How to use safe mode on your Mac - Apple Support
Takes a bit longer to get to the login screen, does a quick disk repair before it fully boots up, and certain system caches get cleared and rebuilt, including dynamic loader cache, etc.
Login and test. Reboot as normal and test. Caches get rebuilt automatically.