It is easy to forget where and when macOS had its earliest origins. His tumultuous path had his first start with Steve Jobs NeXT. "NeXTStep was mainly developed by Avie Tevanian, who used to work the Mach microkernel, a UNIX supercharger at Carnegie Mell University, and Jobs cvinced Tevanian to join NeXT instead of taking something that could change a lot in the short term. would have been more lucrative at Microsoft. "This is a useful, ccise informati about how it all started.