I hate my work computer.
That makes two of us. Windows XP sucks after using Windows 7/8 for so long...
I have a VM or two running XP because it is so much lighter than anything later.
You should use Windows XP instead of MAC OS X (Mega-Awful Crappy Or S hitty Xcretion). Or even 98! Windows 98's pretty good, especially on a Pentium III. Put IE6 on it and you'll be in business!
I used to use Windows 98 SE on a Pentium III 500MHz. I still have the computer - it was in a huge case that I might one day reuse as a server. Or maybe not, I am trying to downsize.
I had a similar setup except it was a P3 ~600mhz in a huge tower and I eventually upgraded it to run XP!
Heh I upgraded mine to run Linux. For such a large tower there was only space for 2 HDD, IIRC. Tiny motherboard.
Yeah at one point I had a motherboard in mine that would crash on windows installation (windows 2000) but linux ran perfectly fine on it.
I had (still have, actually, although whether it still works is another matter) an old server that supposedly supported Windows NT or something of that vintage, but I could not get anything else to install on it, including numerous later Windows and various Linus distros.
I think I eventually got an old Ubuntu to run.
It had 6 SCSI HDD in RAID, each with an LED on the front, and it was somewhat hypnotic to watch all the blinkenlights.