Insert your board-id into ist(please google it) Insert your board-id into OSInstall.mpkg(please google it) Replace boot.efi - boot.efi can be found at System/Library/CoreServices/boot.efi and usr/standalone/i386/boot.efi Source guide (be sure to check out the comments on the same thread for any issues)įollowing those steps to make an install drive. Do not use automated Lion Disk Makers, it will not work (Lion disk maker is great, but it won't be good in this particular scenario!). Guide is bellow, my advice is that you MUST use guide bellow for creating Mavericks installation USB. The same guys are currently making MacPostFactor for Mavericks, but until it's out, here's copy/paste of a guide from Macrumors, together with links bellow! It works great, i'm typing from my Mac Pro 1,1 (firmware hacked to 2,1 gen) running Mac OS 10.9 Mavericks! Then ML Post Factor came and enabled installation of Mac OS 10.8 on unsupported, legacy Intel Mac's. All credit goes to user Tiamo on Macrumors forums, he accepts Paypal donations for everyone who would like to buy him a beer (info on link bellow)įirst and second generation of Mac Pro's (Macpro1,1 and Macpro2,1) have 32bit EFI and because of that since Mac OS 10.7 Lion there was no easy way of installing higher versions of Mac OS on them. Important note, I am in no way responsible for this wonderful hack. They done it, you can install Mac OS 10.9 Mavericks on first and second generation of Mac Pro!

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