After hard shutdown, Audacity won't start Similar to this question (that one related to Ubuntu), but I'm asking about Mac.

When I try to run audacity I get the following error message:


  The system has detected that another copy of Audacity is running.
  Running two copies of Audacity simultaneously may cause data loss or
  cause your system to crash.Use the New or Open commands in the
  currently running Audacity process to open multiple projects
  simultaneously.
On Mac, this was really annoying.

Based on this link, do the following:


Go to /Users/Myname/Library/Application Support/audacity (replace Myname with yours of course)
Open file audacity.cfg in text editor
Under section [Directories], find TempDir, which may look like this: /Users/Myname/Library/Application Support/audacity/SessionData
Go to that folder, and delete file audacity-lock-Myname