![]() However, the current macOS is a UNIX operating system built on technology that had been developed at NeXT from the 1980s until Apple purchased the company in early 1997. ![]() That system, up to and including its final release Mac OS 9, was a direct descendant of the operating system Apple had used in its Mac computers since their introduction in 1984. Thank you.Thanks for sharing your experimentation results.ĭo you know if the results you obtained are 100% reproducible? There's a chance that we are lucky and the memory we touched did not interfere with UEFI firmware/drivers in a fatal manner.The history of macOS, Apple's current Mac operating system formerly named Mac OS X until 2011 and then OS X until 2016, began with the company's project to replace its "classic" Mac OS. To arrive to this conclusions I made these tests: This means that it's possible to test all the RAM without hangs by doing two tests: one from 0x0 to 0x3F000 and another one from 0x3F000 to. For example, a range from 0x12000 to 0x72000 works, but a range from 0x12000 to 0x73000 hangs. It looks like the fix has been applied from 0x1000 instead of the lower limit of 0x100000 that dduncs pointed out.Īnyway, I've been making some range tests, and found that the exact lower limit that works is 0x3F000 and above, if I use 0x3E000 or below, it hangs on test 2.Īnother thing that I found is that ranges with the lower limit starting below 0x3F000 must be shorter than 0圆0000 or it also hangs. Added Mac Mini 2018 to blacklist which sets the lower address limit to 0x1000 by default.Hi keith I'm also using a Mac mini 2018 (i7) and I'm also having this problem with the latest public release.
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