MP 1,1-5,1 Boot from USB - MacPro 2.1 (year 2006)

[bobdenaut]

Hello all,

I need help with my MacPro 2.1 from 2006, I need to boot it from a USB and it doesn't see my USB.
Any hint please? Do I need any special boot procedure?
Thanks

 

[Bigwaff]

Hello all,

I need help with my MacPro 2.1 from 2006, I need to boot it from a USB and it doesn't see my USB.
Any hint please? Do I need any special boot procedure?
Thanks

Are you holding down the Option key while booting until the boot picker appears?

 

[DeltaMac]

What process did you use to make your bootable USB installer?