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#INSTALL OS X MOUNTAIN LION MAC PRO 1.1 HOW TO#
#INSTALL OS X MOUNTAIN LION MAC PRO 1.1 MAC OS#

Then when it is done loading, the OSX Yosemite installer should appear.A bootable ISO or bootable USB can be made directly from the InstallESD.dmg disk image found under Contents/SharedSupport/. Un-archive the zip archive and you will get the app Installer. Both versions 10.8.4 AND 10.8.5 full installers included (zipped). When the Drive menu appears, select Windows Official OS X Mountain Lion.app Installer from the Mac App Store.

When you hear the boot sound, hold the CMD key.

Sudo bless –folder=/Volumes/BOOT –file=/Volumes/BOOT/EFI/BOOT/BOOTX64.efi –setBoot –legacy

once done, run the following command in the terminal:.

Download the following file and place it in the root of your BOOT drive.

Proceed to select the following options.

Run the installer and change the install location to the previous created Boot partition of your USB.

Mkdir /Volumes/OS\ X\ Base\ System/System/Installation/PackagesĬp -r /Volumes/OS\ X\ Install ESD/Packages/ /Volumes/OS\ X\ Base\ System/System/Installation/ Rm -Rf /Volumes/OS\ X\ Base\ System/System/Installation/Packages

In the terminal, run the following commands:Ĭp /Volumes/OS\ X\ Install ESD/BaseSystem.dmg /Volumes/OS\ X\ Base\ System/Ĭp /Volumes/OS\ X\ Install ESD/BaseSystem.chunklist /Volumes/OS\ X\ Base\ System/.

Key Step: Drag the mounted BaseSystem.dmg (white one, not the file with the disk on it) into the Source field and drag ‘Installer’ (from the disk util list) into the Destination field.

Even with the differences, you can still create a clean installation of Lion on an internal drive, a partition, or an external drive.

#INSTALL OS X MOUNTAIN LION MAC PRO 1.1 MAC OS#

select Master Boot Record but make sure you are still formatting it as Mac OS Extended Apple made the installation process for OS X Lion (10.7) slightly different than it was for previous versions of the operating system.Open up your terminal and run the following: cd /Volumes/OS\ X\ Install\ ESD/.go to ‘Contents/SharedSupport’ and mount InstallESD.dmg Like Lion (OS X 10.7) before it, Mountain Lion (OS X 10.8) doesn’t ship on a discit’s available only as an installer app downloadable from the Mac App Store, and that installer doesn’t.Download the OSX Yosemite Developer Preview.app.

AmongTech is not responsible for any damage this might do to your Mac

Reminder:This is an unofficial guide and we highly recommend you back up all of your data before we start.

#INSTALL OS X MOUNTAIN LION MAC PRO 1.1 HOW TO#

The community has found a way of installing OSX Yosemite on an older Mac Pro, here is how: How to install Mac OSX Yosemite on older Mac Pro The latest officially supported version was the 32-bit version of Mac OSX Lion but the Mac Pro’s have no problem in running a full-fledged 64-bit architecture OS. Apple’s latest operation system which is currently in beta Mac OSX Yosemite isn’t compatible with the older 20 Mac Pro while they are perfectly cable of running the new OS as far as performance goes.