I see a strange thing on all left borders of Finder windows:

Left side of Finder window

The background is 1px moved, and the rounded corner mask fails.

I thought it was only me, but I saw this on several computers (iMacs and MBP, ML).

I can't believe Apple saw this and did not fix it… Anybody know where it comes from?

And after upgrading from 10.8 to 10.9.3, I got the same + a 2px height (instead of 1) title bar border… It now resolves when displaying and hiding toolbar.

EDIT bis
So, I had a brand new Mac in hands, didn't install any software yet, and when I hid the Toolbar and showed the status bar, same bug. So you all have this (don't you ?).

Left side of Finder window

EDIT ter
So, just updated to Yosemite, on 10.10.2, there's still a similar bug. Am I the only one to use Finder windows without toolbar? I cant' believe no one saw this at Apple.

  • Huh, I do not see this (10.9.3). There are a lot of things that can be shown and hidden though: Tab, Path, Status, Side, and Tool bars. I wonder if to replicate it you have to show or hide them in a particular order. That would make it pretty easy to miss. – dwightk May 23 '14 at 15:19
  • Whatever I show / hide, if I achieve to resolve this, when I close the window and open it again, it's back… – Joan May 23 '14 at 16:49
  • Is it only visible during the transition for you? I see something like the two pixel issue you mentioned, but only during the transition animation. – dwightk May 23 '14 at 17:33
  • Oh no, it's not only during transition, it's always. I open a window, and I got this. – Joan May 26 '14 at 9:30
  • One year later, just tested this in 10.10 DP2 and the bug still exists. – grg Jul 1 '14 at 17:33

Yes - that's a bug that might get fixed if it's not intentional.

You can lobby for fixing at https://developer.apple.com/bug-reporting/ and posting it to https://openradar.appspot.com to get community support to duplicate your request

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