TechTool Pro by Micromat is truly one of the more robust and full featured maintenance utilities offered to the OSX masses. It has such a complete suite of repair, maintenance, and repair utilities that one’s Apple computer should always be running at the peak of its performance threshold. TechTool Pro also offers the ability to construct an emergency bootable partition containing TechTool Pro which is useful so long as your main drive works. You can create this drive elsewhere, but what if you wanted something portable?
Yes, you can run the CD/DVD but you risk scratching the disc, and of course these drives are a tad on the slow side. With the current Intel Macs, booting from a USB and Firewire drive is a great option and so using portable large capacity flash drives, portable USB/Firewire hard disks, or your old iPod provide worthy alternatives.
Protogo, once installed, walks you through creating an “OSX profile” of varying sizes depending on your destination drive. We had an old 20 GB Firewire iPod lying around which provided a perfect test bed to use Protogo. We really were not using it anymore due to its battery life and it was collecting dust. Why not use it for those odd occasions that a Mac user might find themselves in when their system behaves oddly? A perfect solution to help fix a fiends Mac. All you have to do is bring over your iPod (or whatever you decided to use as your portable device) and run the suite of maintenance utilities to restore nirvana.

When first creating your specific profile you can choose from the default ones which range from a “Full OS X Copy” to a “Mac OS X Minimal Profile”. Obviously due to space limitations, we chose a “Basic” profile which created 1 volume with default applications.

These included TechTool Pro, DiskStudio for partitioning, and OS X system utilities such as DiskUtility. You also have the option of adding your own apps so long as they can function by simply copying them over during your profile creation. Safari works, Textmate works, but BBEdit froze. Of course you will have to either re-register your shareware apps, or lose your bookmarks and preferances which was the case with Safari.
The option of adding your own programs such as a web browser is very useful because it allows you to have a working bootable drive that you can surf the web to find solutions for a particular problem.
The only thing missing is Finder. You cannot browse your hard disk. This is very inconvenient and should have been addressed by the inclusion of a finder replacement such as XFolders (which is what we added). We were able to browse our main drive and launch apps which ran fine from our root partition. (as noted, some apps do not work).
All in all, Protogo provided a very convenient and straight forward approach to OS X and disk maintenance, and resurrected our old iPod to become a worthy portable rescue utility.
Please note, that when using an iPod, it cannot be used to play music and becomes relegated to a disk drive. You can restore it from within OS X to function with iTunes again.
From Micromat:

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