Are they Intel Macs? M1 (ARM) Macs won’t boot a x86 operating system.
When I have made OSGeo Live bootable USB drives, I've worked from the ISO
download image. That image includes a combined BIOS MBR boot/CDROM El Torito
boot (isolinux) and an EFI boot (grub). The Mac sees the EFI boot.
My 2009 Mac finds it when holding down the Option key on startup.
I'm not sure how two NTFS partitions play into that, but I think at least the EFI
partition needs to be FAT32 (HFS+ is also allowed as a special case for the EFI partition
on a Mac, but it is not necessary). I suspect a NTFS partition could be added after the
existing partitions on the image if one was careful. The partition table on the image is
a bit weird with the ISO9660 "partition" overlapping the partition table and
the EFI partition, so I'm not sure if normal tools can edit it without messing something
up.
On Mon, Feb 14, 2022 at 23:20 Jochen Albrecht <jochen.albre...@gmail.com> wrote:
As part of my Advanced GIS course, I provided every student with a 32 GB
OSGeo-live flashdrive, formatted with NTFS on two partitions. They both fine on
a variety of Windows computers (as well as my Pop OS Linux laptop) but they are
not recognized on my students' Macs.
I don't have a Mac and no experience with them. Following online docs, they
try both the Options and the Command key but to no avail.
I now have the sneaking suspicion that I will have to format the two
partitions to HFS+ and then somehow put the OSGeo archive on it.
Is this correct and if yes, how do I do this without a Mac (I can do the
former with gparted but how to do the latter on Windowsor Linux machine)? Are
there alternative approaches to create OSGeo-live flashdrives that my Mac-based
students can use?
Cheers,
Jochen
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