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Hi Benjamin,

Please specify you AutoCAD version and macOS version you have on your Mac.
How complex is your finished draft?
Do you have issues with saving drawings with only a few lines in it?

>>>>>IVE BEEN ABLE TO SAVE FINISHED WORK BEFORE JUST FINE
How long ago was this BEFORE? Have you installed some system updates recently?

BTW: Please don't use capitalised text, it is very hard to read such text.