One question though: when I boot in to leopard, the desktop takes forever to load, and I have to choose one of two account profiles to load (the old one from tiger and the new one from leopard). When I boot in to tiger, the desktop load is fast, and I do not have to choose the account to load - it automatically loads the tiger account profile, which is the only available profile in this partition (whereas, in the leopard partition, when I go to Accounts in System Preferences there are 2 account profiles.)

Is there a way to remove the second account profile, which I do not use anyway, from the leopard partition?

Has nobody succeeded in doing similarly on an Intel Mac yet?

I notice the author of this blog dropped out right after he made the inaccurate statement, “Tiger installation DVD’s are all the same.” More on that below.

My Motivation: I’ve discovered the lack of backward compatibility with Mac OS X 10.5. For example, older versions of Preview, the ones that allow you to annotate a pdf file with yellow block text, won’t run under OS X 10.5. The Preview installed for this OS X allows only annotations in the margins. Likely this is a concession to Adobe–these yellow blocks of text, while somewhat inelegant, allow you to type into pfd forms in a way that is only possible otherwise using Acrobat Writer–which is not free.

I find this trend on the part of Apple to be somewhat draconian–more in a spirit I have come to associate with Microsoft–yet Apple does it in a more insidious way. As Apple moves from Tiger to Leopard to Snow Leopard, they shut the door on the Classic environment, then the Universal binary, and finally G3, G4, G5 machine architecture. I didn’t know this was happening until I found myself in front of a brand-new Intel iMac with Leopard installed, unable to run some software.

I’m not willing just to throw away all that “obsolete” software with functionality that I find useful, features that may become anti-features with persistent software “improvements.”

My Assumption: no one who has tried to create this dual-boot (10.4-10.5) setup has done so on an Intel Mac for which they had a working Tiger installation DVD–regardless of whether they had already installed Leopard or not. Correct?

For the moment, I have to reject what “Mac Geinus (Not his job!!)” wrote (December 18, 2008 at 9:37 pm) about “LEOPARD MACHINES” having hardware that Tiger doesn’t know about, and statements by others who don’t appear to understand why they can’t use the Tiger installation DVD that came with their PowerBook G4 to install Tiger on their 20″ Intel iMac. Although, I would allow for the possibility that Apple has implemented firmware “keys” to protect their interest in upward-only compatibility, rendering an Intel Mac incapable of running the Intel version of OS X Tiger.

Contrary to what deckard wrote (March 9, 2008 at 8:09 pm), not all Tiger installation DVDs are created equal. In fact, Apple issued machine-specific installation DVDs with each model purchased. (One example of this: I was unable to install 10.4 on a 2004 iBook G4 from an installation DVD shipped with a 2005 iBook G4.) I have a DVD (the retail version of Tiger) that I purchased separately that should work on any G3, G4, G5 machine equipped with built-in FireWire and a minimum configuration. But it won’t work to install Tiger on an Intel machine such as my new iMac.

All my claims about Tiger-machine compatibility can be found on the web (here’s one source: http://en.wikipedia.org/wiki/Mac_OS_X_v10.4).

Unless someone else has proven my assumptions faulty or has solid information about some newer Intel Macintosh machines or firmware subverting OS X Tiger, I am in search of a Tiger installation DVD for Intel Macs.

My wife got a new MacBook pro w/ Leopard pre-installed, but needs 10.4 to run Photoshop 7.

Thanks!

to all those who have successfully done this. Is it all working out OK?
I am hoping to do this, but a worker in a computer (mac) store said that they didn’t advise it and that they could corrupt each other???!!! I don’t see how but am no expert and now he has planted a seed of doubt in my mind.

I need to keep Tiger for running Pro Tools software, but want Leopard for most other things.

For people that have been using this dual boot method for a while now, have your experiences been good?

Or is there any potential problems lurking down the line??

Thanks

You’re missing the part where retail Tiger disks don’t contain Intel code; only the model-specific DVDs that came with the respective computers contain the Tiger code needed to install on those machines.

So Mac Geinus appears to be correct; I will have to look at my retail copy of Tiger at home myself to confirm.

-Christian