I was flying my Aerofly FS2 on both my 27" mid2010 macOS Sierra imac and on my 27" 2017 imac Mohave. All of a sudden it won't play on either computer. It starts up, loads scenery. Then when I click "start" it crashes and gives me a crash report which I send to apple (and saved to my desktop). Makes no difference which scenery I have selected or which plane. Nothing else but the keyboard is plugged into the computers. I have tried a SMC Reset, hard drive first aid, and PRAM reset all with no results. I have tried uninstalling and re-installing Aerofly FS2 (and that takes a long time to download). I'll try to attach the crash report.aerofly fs2 error.pdf
Try rebuilding the dynamic link library cache. Open "terminal" and enter 'sudo update_dyld_shared_cache' then reboot and retry.