If you download and install MLA v1.2 on Mac OS X Sierra (10.12), MLA may well crash. This is due to additional security in Mac OS X Sierra. If MLA was installed prior to you upgrading to Mac OS X Sierra, you should not encounter the issue.
To fix the issue, a new disk image of the installer is now available on the Download page. The disk image (DMG) is now signed with a developer ID and will install and run the MLA application correctly. There are no other changes other than the signing of the disk image. If when you launch the MLA application, you get a dialog not allowing it to open as it says it is from an unidentified developer, try ctrl clicking on the application icon and choose ‘Open’. You will then get a dialog that will allow you to open the application.
Oct 6 2016
Mac OS X Sierra (10.12) Update 2
If you download and install MLA v1.2 on Mac OS X Sierra (10.12), MLA may well crash. This is due to additional security in Mac OS X Sierra. If MLA was installed prior to you upgrading to Mac OS X Sierra, you should not encounter the issue.
To fix the issue, a new disk image of the installer is now available on the Download page. The disk image (DMG) is now signed with a developer ID and will install and run the MLA application correctly. There are no other changes other than the signing of the disk image. If when you launch the MLA application, you get a dialog not allowing it to open as it says it is from an unidentified developer, try ctrl clicking on the application icon and choose ‘Open’. You will then get a dialog that will allow you to open the application.