well, it does most of the things you'd expect UPS software to do. i use a Smart-UPS 1500VA with a G5, LCD, and OS 10.4.6.

first off, the hardware leaves something to be desired. if you lose power and the battery totally depletes... IT DOES NOT POWER UP WHEN POWER IS RESTORED. wow. just... wow. i'm also having some issues with it detecting the battery levels properly: if i yank the cord to test it, the reported level will drop quickly, then fluctuate between roughly 10% and 40%. i know my G5 2.5DP is a power hog, but this should handle it.

the software's interface is clunky. buttons are unlabeled and lack tooltips, the prefs windows are laid out strangely ("Exit" button midway down the right side?!).

the documentation is labeled for the OS 10.3 version, and does not have a change log.

the software has a small fraction of the functionality of the Windows version. that's pretty pathetic, in my book. go ahead, look at the Win version's manual: SNMP support, e-mail warnings, better graphs and loggins, a gazillion more actions...

the logging and warnings are obnoxious: do i really have to be constantly reminded that the power is gone? i think the incessant beeping lets me know, thanks - and, no, the software buzzer disable doesn't always work. sometimes the software likes to run multiple instances of Bulldog.app - wtf?

the installer is stupid. i've seen Bulldog.app "lose" preferences: you set something, like changing the low battery level, click OK and reopen the box and... just kidding, fooled you! the installer PUTS THE WRONG PERMISSIONS ON THINGS - that's a big throbbing check in the "don't know jack about Mac" column. check the permissions of all the files in the Bulldog folder! owner should be the main user, R+W, group should be admin R+W.

what's the bottom line? it's moderately better than the Energy Saver panel's controls, and, dejected and defeated, i'll keep using it unless i buy a different brand. if you happen to be a Belkin dev, it would be even nicer if everything worked closer to the Win version. the only advantages over Energy Saver: more displayed info; more flexible shutdown and warning options; logging; and the part that makes it really, really better than Energy Saver is the ability to run scripts on shutdown. however, that's hardly a saving grace.

i don't know what the hell people do when they have a critical Mac server that needs a battery backup, but i think they'd be pretty screwed. Belkin has a lot of work to do, and could profit by trumpeting better Mac support.