Making the project more challenging was that wanted to record the video of the process, which involved capturing the computer screen during all the various upgrades. selected an M.2 SATA solid state disk drive, which with the appropriate adaptors, can present itself as a parallel ATA drive, a serial ATA drive, or just used directly as an M.2 SSD in the more modern computers. The process was not without its glitches, most of them having to do with the OS disk partitioning and format. You can see in the lead photo the success, where the Mac OS 8 search tool Sherlock is shown in the dock of a MacBook Air running High Sierra. Mac mini 2009 (Intel Core 2 Duo Penryn)Īcross three of the four processor families spanned by the Macintosh line of computers since their introduction in 1984.documents his efforts on his blog (in French English translated link is here).Īlong the way, he installed 24 different operating systems He recalled watching an old video which demonstrated a continuous upgrade from DOS to Windows 10 (we think this video from 2016 may be the one), which gave him the inspiration for this journey. With some time to kill and an array of old Apple computers on hand, wondered if he could continuously upgrade a single OS drive from the oldest system he had, System 7.1 on a Performa 630, to the latest version of MacOS on a MacBook Air.