Decade old code might compile but might not run on modern hardware. E.g. I have some code base, s7 scheme + c++, which is 100% posix and it compiles on M1 macs

Decade old code might compile but might not run on modern hardware. E.g. I have some code base, s7 scheme + c++, which is 100% posix and it compiles on M1 macs but does not run. And no this is not due to the change from x86 to arm, as the code runs fine on x86 linux as well on e.g. raspberry pi's. macOS seems to prevent drawing outside of the main thread. IIRC this used to work in the past on OSX. I know, you shouldn't do this, but as it works fine on other platforms/systems...