Warning: SUID file "System/Library/CoreServices" has been modified and will not be repaired.

Thanks Varjak.

I haven't read all the posts regarding this issue but, here's a link to a MAC World article regarding this. I too have been getting the same warning when repairing permissions. Since my iMac is still under extended warranty, I called. No one could give me answers (to this as well as a PHOTOS problem). I followed the Mac World recommendation and the Warning is gone, along with so many other permissions that were always appearing.

I see this is a relatively old thread, but as people start installing El Capitan (like me) this needs to be addressed. It's important to understand what the L at the beginning of the permissions listing is. It's just a marker to show what kind of file it is. L = link. D = Directory. - = file.

To me, it would appear that if this designation were different, in one case, it is looking at a link, but expecting a file. Of course, assuming the link actually resolves to an EXISTING file, then correct: this warning is not something to worry about.

I just wonder if it could be an indication that a file might have been moved, or a link broken? It might NOT indicate a broken link, but until something tried to access the target of the link, would we even know? I don't think the permissions scan tells us that?

I'm bumping this because I was able to run a normal repair that looks clean after locating that specific app, selecting show package contents, located it in the Contents > MacOS folder and then selected get info on it. Changed the system access to Read Only. Ran the repair again and it came up 100% clean.

You might want to consider starting a new discussion. Since this one is marked solved and is a couple of years old, less people are likely to look at it. A new post would be much more visible. You can link to this one.