![]() This allows Apple to benefit from the open-source testing of its kernel’s stability while keeping the system as a whole a closed architecture, for its own eyes alone. The OS itself is not open source, nor are any of its interface components. Some might be surprised that the kernel of OS X and macOS is actually open source (Opens in a new window), because it derives from that code base. The reason for this caution? The new OS version completely gutted and replaced its predecessors’ underpinnings, upgrading it with a highly stable UNIX base. An operating system upgrade is supposed to make your life easier, not force you to spend hours figuring out how to perform everyday tasks.” Not at first, anyway, and maybe not even for a day or two. ![]() It begins, “Mac users, you're not going to like this. PCMag’s first appraisal of the new OS X was not encouraging. Readers with short or selective memories may be startled to learn that three years prior to the 2001 launch of OS X (the “X” is pronounced “ten”), Microsoft, in a bid to avoid appearing to be a monopoly, invested $150 million in Apple to help keep the company afloat. There were plenty of other microcomputer (the term used at the time) makers that did go under-Amiga, OS/2, and CP/M system builders among them. It may be hard to believe today, with Apple now a trillion-dollar company, but prior to that triumphant return, Apple’s computers were in a perilous position, with some even thinking the brand might not survive. It was a result of Steve Jobs coming back to Apple in 1997 along with his NeXT company's operating system software, on which OS X was partly based. The arrival of OS X was, itself, perhaps the most significant turning point in the history of the Mac. How to Set Up Two-Factor Authentication. ![]()
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