High Sierra no App Icon

I have the same issue, don't know why, frustrating.

I find this manual fix works: https://support.apple.com/en-us/HT201737

I found the correct icons usually in Applications->Right click on the app "Show Package Contents"->Contents (folder)->Resources (or somewhere in that root folder).

Apple, this is a problem. As a long time user and stock holder the recent rounds of software issues are not impressive.

Exact same problem. Dock icons, task switcher (CMD+Tab), Mission Control, Launchpad, Applications directory (and Utilities subdirectory) are all filled with dozens of the generic icon. This includes Terminal, TextEdit, Mail, Spotify, etc.

Googling only finds this problem on older versions of macOS, and the solutions don't work due to the inability of even root to touch /Applications/* directories. Time to file an official bug report I guess.

I have just reinstalled High Sierra and similarly many of my app icons have similarly spontaneously gone "generic". Interestingly my wife's MacBook pro was reinstalled at the local Genius bar yesterday and when we got home she had similar problems.

I tried this, to no avail. In the Info window, I can select the generic icon but Paste is greyed out on the Edit menu so I can't replace the icon that way. I found the source icons as you described, and neither cut-and-paste nor dragging the Icon to the Info window worked.

Again, longtime Mac/Apple user. Not impressed that my $3,000 laptop looks like this now.

It seems this problem is caused by League of Legends as you can see on their forums :

[CLIENT] Updating on Mac High Sierra messes up other application icons

Mac application Icons missing after launching LOL client

Unfortunately there is no solution yet. But, what you can do is login on their forum and upvote the issues so that LoL developpers get aware of this.

I don't know what "League of Legends" is. I don't have it. This is not the source of my problem.

I have been on High Sierra for a couple of months. Nothing (as far as I know) changed this afternoon, but SUDDENLY, several of my icons (Mac Mail, iTunes, and Evernote) are doing the same thing. Now I am supposed to try manually cutting and pasting the icon from .. what, the application in Finder to.. what?? Or go find its image online and cut and paste?? Please.

And anyway, how does that change what's in the dock?

Ex: I am seeing my regular Mac Mail icon in the Finder window for Applications. But I have the generic icon on the dock AND in the Task Switcher (Command+tab).

Is anybody home at Apple that can advise on this?? It is a big pain, and threatens to make the dock nearly unusable.

PLEASE advise!

I'm having this same exact issue.. heres what my Applications folder looks like after upgrading to High Sierra:

Same Issue

If you click on the rocket on the dock, your apps should be there. they have been redesigned recently so some look different.

Same problem here, did you find any answer?

Been in touch with Apple Support and all they could suggest was to reinstall High Sierra. Seems drastic but giving it a try.

That is pathetic, Apple. I will try this.

Never mind. I tried pulling them out of the dock, and then re-entering them from the app and they seem fine now. Thanks, and sorry I kind of panicked.