new guide for installing mountain lion gm on unsupported macs

first of all, still need make sure cpu supports 64bit extension. since mountain lion not contain 32bit kernel now.

preparation
1, working osx, version fine
2, mountain lion gm installationesd.dmg, file name different.
3, partition or flash disk has @ least 5gb space. used installation source.
4, board id , name of mac
5, patch

installation
1, open terminal, , enter defaults write com.apple.finder appleshowallfiles yes
2, enter killall finder
3, double click installationesd.dmg mount
4, double click hidden basesystem.dmg in new finder window mount.
5, open disk utility , format installation source partition hfs+
6, restore mac os x basesystem installation source
7, copy mach_kernel root dir of mac os x install esd root dir of installation source.
8, copy packages root dir of mac os x install esd /system/installation of installation source , replace original one
9, copy osinstall.mpkg of patch /system/installation/packages of installation source , replace original one
10, copy boot.efi patch /system/library/coreservice , /usr/standalone/i386 of installation source , replace original one
11, edit /system/library/coreservice/platformsupport.plist of installation source add board id , name of mac
12, copy modified platformsupport.plist /system/library/coreservice/com.apple.recovery.boot of installation source , replace original one
13, reboot , hold option key until boot menu shown
14, choose installation source boot
15, install
16, copy modified platformsupport.plist /system/library/coreservice of installation target , replace original one. may in terminal before system reboot while installation progress completed

known issues
1, find mac of icloud not work.
installation method not create recovery partition you. need create fix issue.

2, sound driver not work.
may fix issue installing old applehda.kext lion.

3, graphics driver not work.
there no complete solution issue @ time. , may porting linux graphics drivers intel osx.

4, 32bit efi case kernel panic when have more 4gb ram installed.
there no solution issue @ time.

detailed changes between original , patched boot.efi, see post

 

great job dead.xx!

have technique, using compatible mac :

- before doing anything, boot old mac , board id (something mac-f4208ec8)

# ioreg -l -p iodevicetree | grep board-id

- if mac running lion, save /system/library/extensions/applehda.kext

- install using compatible mac , old mac remote disk in target mode (boot pressing "t" until firewire symbol appears)

- after install, system still booted compatible mac, edit /system/library/coreservice/platformsupport.plist , add board-id

- copy boot.efi dead.xx's patch /system/library/coreservice , /usr/standalone/i386 , replace original ones

- copy saved /system/library/extensions/applehda.kext

- should go!

 

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