Editor Crashes On Launch On OSX 10.13

Exactly the same thing happens to me, please what do we have to do? Also I’m unable to use more recent versions since my video card does not support metal.

System specs: Mac OSX High Sierra 10.13, Mac Pro (Mid 2012), 2 x 2,4 GHz 6-Core Intel Xeon, 2 x ATI Radeon HD 5770 1 GB