* btwotch wrote in grml's BTS on 20120518 / 14:10:

> hmm, ok, accepted, thx so far!
> do you have docs for building an efi usb key on a mac using linux, too?

No, we don't have yet, but feel free to update the wiki :)

regards,
-mika-

hmm, ok, accepted, thx so far!
do you have docs for building an efi usb key on a mac using linux, too?

dd-ing the ISO won't work for USB devices on Mac as there isn't a GPT table
present then but EFI wants GPT when booting from USB.

We have docs how to get such a working key in our wiki:

  http://wiki.grml.org/doku.php?id=usb#building_an_efi_usb_key_on_a_mac

We're working on a way how to better present this information on the download
page, feedback and help is welcome.

Steps to reproduce:
- dd if=grml.iso of=/dev/sdb
- reboot macbook
- press 'alt' and wait that usb shows up
- usb device doesn't show up

Expected behavious:
usb devices shows up and boot is possible

Actual behavious:
boot is not possible

system configuration:
00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT
Express Memory Controller Hub (rev 03)
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS,
943/940GML Express Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML
Express Integrated Graphics Controller (rev 03)
00:07.0 Performance counters: Intel Corporation Device 27a3 (rev 03)
00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio
Controller (rev 02)
00:1c.0 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 1 (rev 02)
00:1c.1 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 2 (rev 02)
00:1d.0 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller
#1 (rev 02)
00:1d.1 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller
#2 (rev 02)
00:1d.2 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller
#3 (rev 02)
00:1d.3 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller
#4 (rev 02)
00:1d.7 USB controller: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller
(rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge
(rev 02)
00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller
(rev 02)
00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7-M Family) SATA
Controller [IDE mode] (rev 02)
00:1f.3 SMBus: Intel Corporation N10/ICH 7 Family SMBus Controller (rev 02)
01:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8053 PCI-E Gigabit
Ethernet Controller (rev 22)
02:00.0 Network controller: Atheros Communications Inc. AR5418 Wireless Network
Adapter [AR5008E 802.11(a)bgn] (PCI-Express) (rev 01)
03:03.0 FireWire (IEEE 1394): nee Agere Systems nee Lucent Microelectronics
FW322/323 (rev 61)

Software version:
idk