No son, Linux is not a version of Unix anymore than MINIX is. NeXTStep was real UNIX, but macOS is not. BTW, I was taught to program in C by one of the origin

No son, Linux is not a version of Unix anymore than MINIX is. NeXTStep was real UNIX, but macOS is not. BTW, I was taught to program in C by one of the original core Unix team members and I worked for DEC long before I could have discussed TesseractOCR with people who didn't. Keep those ignorant downvotes commin'