My saves from a GOG copy don't work properly on the mac source port

[Nergus]

When I loaded the saves into Unreal for Mac (I'm in Terranux something), it loads okay, but when I quicksave and then quickload, the save is completely corrupted and it won't load at all. Even with manual saves and manual loads the problem is still the same.
These save files all come from my copy of Unreal Gold downloaded through GOG, and the game was already updated to 227 before making the transition to the Mac version.

Fortunately I don't have this issue while playing the game from the beginning.