Currently Being ModeratedJan 30, 2013 1:06 PM (in response to Alex in devon)
Do you have the Mountain Lion installer application? If not, do you have an emergency USB flash drive with your Recovery HD on it? Or do you have a recent Time Machine backup made since you installed Mountain Lion on your computer. Where will Mountain Lion come from that will be installed onto the older computer? Does the older computer already have Mountain Lion installed, and does it have a Recovery HD partition?
I dont have the ML installer application as far as I am aware. I do have a bootable USB with ML on it, whicb i have used to upgrade our other MBP's.
I was assuming that ML for the older machine would come from this usb drive.
The older MBP has ML 10.8.2 already installed on it, and no I cannot see a recovery partition unless it is hidden. Disk Utilities only shows the Macintosh HD partition.
M<y ideal aim is to give my wife as clean a machine as possible with none of my baggage on it.
Currently Being ModeratedJan 30, 2013 1:23 PM (in response to Alex in devon)
As long as you have your own installer that simplifies matters quite a bit. But it's simpler to do this as long as a Recovery HD is on the drive (yes, it's hidden.)
Install or Reinstall Lion/Mountain Lion from Scratch
Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard drive.
Boot to the Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Erase the hard drive:
1. Select Disk Utility from the main menu and click on the Continue button.
2. After DU loads select your startup volume (usually Macintosh HD) from the
left side list. Click on the Erase tab in the DU main window.
3. Set the format type to Mac OS Extended (Journaled.) Optionally, click on
the Security button and set the Zero Data option to one-pass. Click on
the Erase button and wait until the process has completed.
4. Quit DU and return to the main menu.
Reinstall Lion: Select Reinstall Lion/Mountain Lion and click on the Install button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible
because it is three times faster than wireless.