After browsing through multiple posts, I finally was able to install Qubes on a MacBook Air 13” mid 2011 (MacBookAir 4,2). I’m just sharing this, so ppl don’t need to read through multiple forums to understand how to do it.
# bless –device /dev/diskX –legacy –setBoot –nextonly # bless the disk not the partition
# reboot
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Insert Qubes 3.2 USB flash:
ISOLINUX boot screen should come up.
Install Qubes normaly
If you try to boot Qubes now, it will freeze while “setting up networking”. You need to put the Broadcom wireless device into PCI passtrough [2,3]. Or, as an alternative remove it from your mac (https://www.ifixit.com/Guide/MacBook+Air+13-Inch+Mid+2011+AirPort-Bluetooth+Card+Replacement/6360) and Qubes will boot up smoothly.
# bless –device /dev/diskX –legacy –setBoot –nextonly # bless the disk not the partition
# reboot
~~~
Insert Qubes 3.2 USB flash:
ISOLINUX boot screen should come up.
Select Troubleshooting and Boot the Rescue image; insert disk password when prompted; select continue and after mounting the HD filesystem, launching a shell, chroot as instructed.