Installing older/newer versions on Mac

[Mincalo]

There seems to be and issue on Mac where if you have a newer version of the game installed any older versions simply won't work. Every time you launch will give the message "YSFlight has quit unexpectedly." however there is a fix which is completely deleting the newer version which is a simple process.

1. this step is optional but I recommend that you screenshot or in some way save your keybinds and your addons.

2. next delete the ysflight folder (to find this easily just right click your ysflight shortcut and select options>show in finder)

3. go to /Users/username/Library/Application Support and delete YSFLIGHT.COM and do the same with /Users/username/Documents/YSFLIGHT.COM

4. download and install the older version of your choice and it should run just fine. at this point you can re-add your addons and keybinds

[waspe414]

Some versions of Mac don't support the 32bit 2015 at all, so if the above still doesn't work, you can download 20170517 test version, which is 64 bit and compatible with 2015 servers

[Airturtle747]

Using that test version causes the screen to just flash black and white on my mac.

[decaff_42]

I ran into issues like this when going from 2012 thru 2015 versions. After installing and opening a newer version of YSF, I couldn't get an older version to work at all. I never got to root cause. That was before the issues that Waspe414 mentioned with 32vs 64bit compatibility and newer macOS blocking non-64bit apps