On Yosemite 10.10, I was trying to use defaults to modify the Info.plist file of an app, but after such command, osx does not reload modified Info.plist.

I've tried to move the app around and reboot, as mentioned somewhere else as a way to force osx to reload Info.plist, but failed.

So here's the problem, How do I force osx to reload the Info.plist file of an app?

Specifically here is what I want to achieve:

Currently the flash in Firefox runs in low resolution when in fullscreen mode, to fix this I need to make the Firefox.app/Contents/MacOS/plugin-container.app HiDPI compatible.

According to this, after this command:

defaults write /Application/Firefox/Contents/MacOS/plugin-container.app/Contents/Info.plist NSHighResolutionCapable true

I should be able to uncheck the "Open in Low Resolution" checkbox. But no, modifed plugin-container.app still has a greyed-out checkbox in its info panel. Rebooting does not solve the problem.

Here's the weird part: I moved the modified plugin-container.app to somewhere else, then I was able to uncheck that checkbox. But I moved it back and that checkbox became greyed-out again.

An work-around I found is

  • copy another app to /Application/Firefox/Contents/MacOS/ and renamed it to plugin-container.app (I call this the "fake plugin-container.app"),
  • then replace fake one with the modified one.

In this way I can have the "Open in Low Resolution" checkbox back and am able to uncheck it, but system doesn't update the app icon after replacing, so now the app icon of the modified plugin-container.app is still the one of the fake plugin-container.app. A problem is fixed but another is created.

So what is the proper way to have the system reload the Info.plist?

  • You need to clear the cache folder.
    – Ruskes
    Commented Dec 16, 2014 at 7:19
  • Maybe LaunchServices should be rebuilt? apple.stackexchange.com/questions/125402/… Commented Dec 16, 2014 at 10:01
  • @Buscar웃 I can locate the cache folder at ~/Library/Caches/ but not sure which folder is responsible for plist file caching.
    – toaruScar
    Commented Dec 16, 2014 at 11:03
  • @MateuszSzlosek That fixed the icon glitch, thanks. But the main problem is not affected by a rebuild.
    – toaruScar
    Commented Dec 16, 2014 at 11:15
  • What made you believe that by modifying the Info.plist will change to HiDPI mode?
    – Ruskes
    Commented Dec 16, 2014 at 19:09

1 Answer 1


I've just had this issue as we had to change Info.plist in our app and it failed to run for anyone who updated from the previous version of the app. The easiest way I found of clearing the Info.plist cache was simply to move the file to a different directory, then move it back. I'm still hoping to find a way of doing it pro grammatically, but this should do for your case.

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