Am Dienstag, 7. April 2020, 01:38:01 CEST schrieb Michael: > On Monday, 6 April 2020 22:15:20 BST Neil Bothwick wrote: > > On Mon, 6 Apr 2020 22:02:04 +0100, antlists wrote: > > > > This isn't strictly true, the ESP must be vfat, but you can still > > > > have an ext? /boot. > > > > > > This isn't true at all - you've got the cart before the horse. The > > > original (U)EFI spec comes from Sun, I believe, with no vfat in sight. > > > > > > A standards-compliant factory-fresh Mac boots using UEFI with no vfat > > > in sight. > > > > That's true, but firmware on commodity PC motherboards can only be relied > > upon to handle vfat. So while my use of "must" is a bit strong, it should > > be vfat if you want to be sure it will boot on a PC. > > Perhaps older UEFI specifications allowed Mac-baked filesystems, or perhaps > Apple were/are doing their own thing. The current UEFI specification > *requires* a FAT 12/16/32 filesystem type on an ESP partition to boot an OS > image/bootloader from - see section '13.3 File System Format': > > https://uefi.org/sites/default/files/resources/UEFI_Spec_2_8_final.pdf > > I can't recall the ESP partition format last time I installed and > dual-booted Linux on a MacBookPro, c.2014, but I'd wager it was VFAT.
I checked my 2007 Mac Mini and its ESP is vfat. Of course, newer Macs or other models might use something else. -- Marc Joliet -- "People who think they know everything really annoy those of us who know we don't" - Bjarne Stroustrup
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