I'm running it on a Blue & White G3 that has been upgraded to a G4/500 with ATA 100 and 768MB of RAM.
The BAD:
My XLR8 Mach Speed software is unable to load/run. Given the company's status, I doubt that I'll see an update. I have no way of knowing the status of my card or its cache, though it is apparently running at 500MHz with 1MB of cache according to Apple Profile.
Jaguar has the worst Happy Mac Screen EVER. The screen is soooo bad....how bad is it? The Happy Mac Screen is so bad...I have the urge to damage my hardware in hopes of getting a Sad Mac Screen instead of having to look at the new Happy Mac Screen.
MacReporter doesn't work, but the author says he's going to release an update soon.
It feels faster, but MOX Optimize doesn't run (even after I installed the BSD Subsystem). And much of what is supposed to make Jaguar faster was already enabled in MOX, so it only really feels faster in a few other situations. The upgrade to 10.1 seemed like more of a speed bump....of course those of you who can do Quartz Extreme are going to be much further accelerated.
Show Info now goes back to the old method of opening a new window for each item. I liked it better when it would only open one window.
What happened to Dock Scraps? In very early versions of Jaguar, you could drag minimized items out of the Dock and onto the Desktop.
Still no Window Shade.
It would be nice if you could right click on the Finder Icon in the Dock and select "Hide Others".
THE OK:
I use Office vX, so the Mail.app improvements are meaningless. iCalendar is meaningless. I use iView Media Pro, so iPhoto is meaningless. I use Proteus so iChat is meaningless. I use Watson, so the new Sherlock is meaningless, but I like some of Sherlock better than Watson...I have a feeling I may end up switching to Sherlock as more modules are developed for it. The Desktop randomizer sucks compared to the free 3rd party app, ChangeDesktop.
In short, I'm not a big fan of any of the iApps, except iTunes. These new iApps are supposed to be a big part of the $129. Hmmm....I would be more inclined to pay $129 for Apple *not* to release apps that are going to compete with superior 3rd party apps.
THE GOOD:
Faster in things that were problems in the past, like dealing with windows that had lots of files. Other minor cosmetic tweaks really improve things. Networking is really kick ass.
The new calculator totally rocks. The new Flurry Screen Saver. Search and Find in the Toolbar.