Panther or Tiger?? I'm guessing Panther since the Yikes! was running it. Also, what about the MDD??
Panther, just like the Yikes!
Surprisingly enough, the software on the Yikes! is more current than on the DA. Interestingly enough, they tried to download Firefox 19 in 2013, so the computer hasn't been retired for too long. Actually, all three computers have files as recent as 2013. The Yikes! is running Photoshop and Illustrator CS(one could call Photoshop CS Photoshop 8), while the DA still has(I think) version 5.5 of Illustrator. The box for 5.5 calls for a 68020, System 6, and 5mb of RAM. I'm not sure if it's a "fat" binary or if it's strictly a 68K program. I launched it a minute ago, and it worked fine-if it's a 68K program, that mean's it's running in the OS 9 virtual machine inside OS X and using the 68K emulator in OS 9
Also, the Yikes! has 704mb of RAM(2x256, 1x128, 1x64) and the DA has 3x128. Of course, the Yikes! maxes out at 1gb(4x256) and the DA at 1.5gb(3x512)-I need to order some more 256mb sticks as I have several computers that I want to load with RAM and that's the largest they will take.
Also, of the three the DA was the only one with an OS 9 System Folder. I made the stupid mistake of trying to boot off of it before checking to see if the OS 9 drivers were installed. I got stuck, and the "X" trick to boot into OS X for some reason didn't work on this computer(or maybe the X on my keyboard is dead

). I booted off an OS 9 disk to try and change the start-up disk, but then(stupidly) remembered that OS 9 wouldn't even be able to see the HDD. I had to boot off an OS X disk to get it back up.
The MDD is-as said-a dual 1.25 and is running Leopard. It does at least have OS 9 drivers installed

, although I'd have to install a second hard drive and run the restore disks(which fortunately I have) to get OS 9. Or, I guess I could drag and drop a system folder from another MDD. MDDs take a special OS 9.2.2 build, and the only way to get it on the computer is to run the full restore disks and let it dump the system folder in with 10.2.3 for classic support(or at least that's what Apple wanted you to do, although the folder is bootable).
One other interesting thing-right now, I have the 21" set up right next to the 17" ADC CRT. The degaussing coil on the 21" is
really powerful. When the monitor degausses on start-up, it makes the 17" "wavy" also. OS X will only let you degauss about every 10 minutes-I guess it takes that long for the degaussing caps to charge.