Ubuntu-MATE 23.10 won't boot from USB flash drive on some computers.
On my Desktop it boots, on my Thinkpad T420 it does not.
(the T420 can boot from the same USB flash drive if it contains, for instance, an Antix Live ISO instead of Ubuntu-MATE ISO)
Maybe the reason is the partition-type ?
Antix ISO: partitiontype: 0x00 (bootable)
Mate ISO: partitiontype: Basic Data (System, Read-only)
EDIT: I managed to boot it on my T420 by doing some BIOS magic and so I discovered that the Ubuntu-MATE 23.10 ISO does not support legacy boot.