New install from Leopard upgrade DVD

March 7, 2009 · 0 comments

I ordered my Macbook Pro shortly before OS X 10.5 (Leopard) was released with the confidence that I’d receive a free upgrade from OS 10.4 (Tiger).  While the upgrade was almost free (there was a $10 charge that probably covered manufacturing and shipping costs), it was just that.  An upgrade.  This didn’t bother me too much during my first round of installing Leopard as I already had a previous version of OS X installed.  In fact, I never even realized that there was a difference between the upgrade and retail copies.  I recently decided to format my drive and install a fresh copy of Leopard, and much to my chagrin, I discovered that Leopard wouldn’t install if it couldn’t find a previous version of OS X on the installation volume.  There wasn’t even an option to verify previous ownership from an old installation disc!  I thought I was going to have to do a full install of Tiger before I could install Leopard… that is, until I found the following:

Hi, I’m so annoyed regarding the broken Entourage <-> Exchange SSL root cert situation that I feel I must let others know of the following… To perform a fresh / clean installation of Mac OS X 10.5 Leopard to a totally blank/formatted hard drive using nothing but the upgrade DVD, do the following:

  1. Boot from the Mac OS X Leopard Upgrade DVD (hold ‘c’ while booting).
  2. Notice that the check for previous will fail (and "Continue" button is grayed out).
  3. Choose the option of restoring from a Time Machine backup and go as far as you can (note: if you do actually have a Time Machine backup, pretend that you don’t – making sure you’ve already removed any backup drives you may have plugged in).
  4. Now go back to (almost) the initial screen.
  5. Notice the "Continue" button is no longer grayed out…
  6. Install Leopard while drinking a beer.

Voila!  Those magical steps worked and saved me the trouble of having to do a full install of Tiger before installing Leopard.  Once again, I must thank the Internet for coming to my rescue!

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