Game porting toolkit instal and startup.

I am attempting to install steam to start running games but I cant get past the "ditto /Volumes/Game\ Porting\ Toolkit1.0/lib/ brew --prefix game-porting-toolkit/lib/" because whenever I run this command it says "ditto: Cannot get the real path for source '/Volumes/Game Porting Toolkit1.0/lib/'" May I please get some help

Try to mount game porting kit

Game porting toolkit instal and startup.
 
 
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