Hi,
This is a fairly rare problem that has been tied to doing an operating system update while BeerSmith is still running on the Mac.
I recommend the following steps as a first fix:
- Make sure BeerSmith is not running
- Go to your Home directory and delete the file "BeerSmith2-USERNAME" if it exists where USERNAME is your user name- this lock file usually causes the problem
- Reboot your machine
Let me know if this does not work - in most cases I've found this corrects the issue.
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Cheers!
Brad Smith