adam sallimou Posted October 20, 2021 Author Share Posted October 20, 2021 I have an nvme Toshiba but if you want I can change to a sata ssd Samsung here is the photo of boot manager of Toshiba ssd Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted October 20, 2021 Moderators Share Posted October 20, 2021 Yes, try with the Sata disk instead Link to comment Share on other sites More sharing options...
adam sallimou Posted October 20, 2021 Author Share Posted October 20, 2021 Same error with a Samsung SSD Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted October 20, 2021 Moderators Share Posted October 20, 2021 Do you have UEFI and AHCI enabled in the BIOS Make sure SecureBoot is disable as well Check out my EliteBook 840 G3 guide for the BIOS settings You can find it on my signature file Link to comment Share on other sites More sharing options...
adam sallimou Posted October 20, 2021 Author Share Posted October 20, 2021 I tried to change the bios settings but it gives me the same error Link to comment Share on other sites More sharing options...
adam sallimou Posted October 21, 2021 Author Share Posted October 21, 2021 EDIT: hi guys, finally i managed to start macos big sur by changing the bios settings and changing usb Link to comment Share on other sites More sharing options...
adam sallimou Posted October 21, 2021 Author Share Posted October 21, 2021 I started it works but does not detect any battery and I can't even adjust the brightness of the display Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted October 21, 2021 Moderators Share Posted October 21, 2021 post IOReg file using IORegistryExplorer.app v2.1 By the way what settings in BIOS did you set to get it going? or is it an USB issue Link to comment Share on other sites More sharing options...
adam sallimou Posted October 25, 2021 Author Share Posted October 25, 2021 hello sorry if I didn't answer you immediately but I had some ups and downs anyway here is my ioreg: Adam’s MacBook Pro.ioreg the problem was that 1. the usb didn't work 2. in the bios I forgot to disable the legacy and put 64 bit in the video section Link to comment Share on other sites More sharing options...
adam sallimou Posted November 4, 2021 Author Share Posted November 4, 2021 I would like to know if anyone knows anything please Link to comment Share on other sites More sharing options...
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