Having issues running Legacy on MacOS

[ellile]

I am trying to run Legacy so I can play 1.8.9 on my macOS, on Mac15.0. Nextgen works fine but when Legacy has been providing me with the below error:
libc++abi: terminating due to uncaught exception of type NSException
An error occured:

Process exited with non-zero exit code: 7900.

Any help would be amazing.

[EclipsesDev]

send full log

[kawaiinekololis]

LiquidBounce Nextgen supports 1.8 servers. It supports both 1.9+ and 1.8 combat, so you don't need to use Legacy.