HI, which version of OF are you using? I was able to use ofxSyphon using the current release (OF v0.11.2) on monterrey.
Otherwise, there is this PR which mentions the issue. Check the changed files in it. Maybe it is as simple as changing that.
I decided to take a stab at switching ofxSyphon over to ARC.
It seems to work okay for me with the nightly builds ( before I was getting the same errors you mentioned ).
I see.
OF 11.2 runs on big sur. I am using it right now. The only thing is that when you make or update a project using project generator once you open it in xcode you need to go to File > Project Settings… > Check “Do not show a diagnostic issue about build system deprecation”.
And from there it should compile fine.
And old ofxSyphon works fine with it
Ahh yes - thanks @roymacdonald !
I think you can also change it to the New Build System in that same menu and it should get rid of the error that way too.
Probably good to get a new release out soon anyway as I am sure a lot of users are stumbling on this ( and the video breaking for latest linux too ).