I don't know what Adobe is doing in their installation and when running LR6 but they should clean up their act because resseting file permissions is illogical. File permissions don't change by themselves and should not be changed by running LR. On installing they should create the folders with the correct permissions for all user on a system to use LR. Installing software requires admin privileges, running software should not, that is a basic security tenet. They last time I got this error, I could not even find the two folders in question. I then simply recreated them empty from the finder. I gave all LR folders starting with the Adobe folder and all sub folders in library all the permissions (read, write , execute) to all users and the admin group and admin user. Upon restarting LR it asked me for my licence and I entered it. Has been working since then. also the requirement that you have a account in Adobe cloud or that you need to be logging in Adobe cloud is also nonsensical for the LR local app. I realize that Adobe is pushing hard for all to sign up to the CC edition but cripling the standalone edition is not winning any goodwill. Please excuse this rant but it come from a longtime Adobe customer (since LR 1 and photoshop element 6) frustrated by recent experiences with LR6.
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