I can copy and redistribute macOS binaries, and I can write programs/extensions that modify macOS.
These vague terms show that legislators are incapable of regulating software effectively; but they do create an enduring legal franchise to deal with their confusion.
You cannot. The apple license has multiple restrictions on that prevent you from copying, modifying and redistribution, for example:
> No Reverse Engineering. You may not, and you agree not to or enable others to, copy (except as expressly permitted by this License or by the Usage Rules if they are applicable to you), decompile, reverse engineer, disassemble, attempt to derive the source code of, decrypt, modify, or create derivative works of the Apple Software or any services provided by the Apple Software or any part thereof (except as and only to the extent any foregoing restriction is prohibited by applicable law or by licensing terms governing use of Open-Sourced Components that may be included with the Apple Software).
I can copy and redistribute macOS binaries, and I can write programs/extensions that modify macOS.
These vague terms show that legislators are incapable of regulating software effectively; but they do create an enduring legal franchise to deal with their confusion.
> No Reverse Engineering. You may not, and you agree not to or enable others to, copy (except as expressly permitted by this License or by the Usage Rules if they are applicable to you), decompile, reverse engineer, disassemble, attempt to derive the source code of, decrypt, modify, or create derivative works of the Apple Software or any services provided by the Apple Software or any part thereof (except as and only to the extent any foregoing restriction is prohibited by applicable law or by licensing terms governing use of Open-Sourced Components that may be included with the Apple Software).
From https://www.apple.com/legal/sla/docs/macOSTahoe.pdf
The “under license terms…” is a pretty important clause you omitted here.