I installed Lightroom 5.6 (full version, not trial) on Mac, when starting I receive an error message "An error occurred while attempting to change modules".
I tried removing it and reinstalling but the same error comes up.
Anybody have any recommendations?
A forum thread from 3 years ago talking about LR 1.x which had this problem seems to need permissions fixed or new folders created with the corrected permissions. You might try doing a repair permissions for your user and/or run LR as an administrator user. I am a PC person so cannot tell you exactly how to do that.
Thank you very much it worked!
The problem was in the Lightroom permissions.