sebus Posted October 2, 2021 Share Posted October 2, 2021 iMac 24" with M1 chip: Of course I can boot existing Recovery from HD But I want to be able to boot USB based Recovery, so can try startosinstall (and also fully wipe the HD, just want to test different scenarios) If I use full USB installer (created with createinstallmedia) then this USB is recognized as bootable (and it boots fine) Nothing surprising here But if I try to use a USB that is created from BaseSystem.dmg it is not recognized (but it is also a bootable disk, it works fine for booting in Intel MBP 15,4) So the question: anybody knows WHAT makes USB bootable for Mac with M1 chip ? Link to comment Share on other sites More sharing options...
sebus Posted October 2, 2021 Author Share Posted October 2, 2021 Reading this: https://eclecticlight.co/2021/06/28/making-a-good-recovery-installing-a-different-macos-in-recovery/ M1 Macs The snag with using startosinstall on an M1 Mac, even that provided in its own macOS installer, is that it invariably fails with the errorstartosinstall is not currently supported in the Recovery OS on Apple Silicon Link to comment Share on other sites More sharing options...
sebus Posted October 17, 2021 Author Share Posted October 17, 2021 M1 are just a nightmare to deal with, online authorization to boot from external drive. Nothing had made (apart full installer or external drive with OS installed to) works Link to comment Share on other sites More sharing options...
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