corei3cpu Posted July 10, 2020 Share Posted July 10, 2020 Hi, I previously had an HP z800 with dual 6-core Xeons ( 12-cores total ) and I was able to get it to work with OSX Sierra just fine. It booted and worked perfectly. I still have the USB thumb boot drives. So I recently purchased an HP z420. I want to install OSX Sierra. But the thumb drives dont work. I get a CPU Panic. The thumb drives I have worked with HP z400 with 6-core xeon and z800 with dual 6-core xeons. but will not work with the z420 with 8-core xeon. Here are some photos of the error messages I am getting and the config of my thump drives. Can someone identify why this thumb drive is failing. Actually, I still have the SSD from my HP z800 and i tried to boot from it to with these error messages. Please see photos. 1 Link to comment https://www.insanelymac.com/forum/topic/344467-installing-sierra-on-hp-z420-8-core/ Share on other sites More sharing options...
Rocky12 Posted July 10, 2020 Share Posted July 10, 2020 @corei3cpu https://github.com/NTT123/Hackintosh-HP-Z420-MacOS-High-Sierra-10.13-10.14 Link to comment https://www.insanelymac.com/forum/topic/344467-installing-sierra-on-hp-z420-8-core/#findComment-2729725 Share on other sites More sharing options...
corei3cpu Posted April 8, 2021 Author Share Posted April 8, 2021 I tried that EFI but it causes a panic on my computer. I have an 8-core Xeon and I add the correct kext for this. See photo for CPU Panic. Link to comment https://www.insanelymac.com/forum/topic/344467-installing-sierra-on-hp-z420-8-core/#findComment-2754959 Share on other sites More sharing options...
theroadw Posted April 8, 2021 Share Posted April 8, 2021 What model CPU? Link to comment https://www.insanelymac.com/forum/topic/344467-installing-sierra-on-hp-z420-8-core/#findComment-2754989 Share on other sites More sharing options...
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