Problem

The SourceTree user interface does not open, and the following error message appears:

You cannot use this version of the application SourceTree with this version of Mac OS X

Diagnosis

Environment

• The operating system hosting SourceTree is a version of Mac OS X earlier than 10.6 - Snow Leopard

Cause

SourceTree requires a Mac OS X version newer than 10.6 - Snow Leopard.

Resolution

Upgrade to a Mac OS X version newer than 10.6 - Snow Leopard