- Which version of Lightroom and Mac OS X are you using.
- First i would suggest you to make sure that the version of Lightroom you have is compatible with the version of OS X you are using.
- System requirements
- And if does meet the requirement, i would suggest you to reinstall Lightroom.
The version of the OS is 10.11 beta
Lightroom - I don't know, it doesn't start.
It ran perfectely until last week...
Oh, I see, requirenments are up to OS X 10.10 ... However, it worked as I mentioned above!
I just downloaded an update for lightroom from the internet, The setup.dmg contains a AdobePatchInstaller.app, which also doen's run...