If you are having trouble opening Sunday Guitar, there are a few different ways to open it that can help:
- Open MainStage 3 while holding down the option & ⌘ keys. This always opens a clean session. Then, open a stock MainStage concert (keyboard or guitar), and then open your Sunday Guitar concert.
- Duplicate the entire concert, change the name of the duplicate, restart your computer, and then follow the steps above: open a stock MainStage concert, and then open the newly copied and renamed concert.
- If possible, try a Time Machine backup of MainStage 3.3.
The majority of SG users seem to do well with MainStage 3.4.2 on Mac OS Mojave, but some systems have been performing better with MainStage 3.3.
If you are considering updating, we highly recommend following the instructions in our video here- we talk about updating MainStage or your operating system (OS):