H MAC and the HTC
Yes you can use it with a MAC computer BUT you may still have problems with the install files if they arrive from BT as exe files. CAB files are not a problem
See this thread http://www.beta.bt.com/bta/forums/thread.jspa?threadID=4415&tstart=0
I've copied a few comments here but I don't have a MAC so you'll have to let me know what needs adding/altering/removing here
There are a number of packages around that assist with the syncing of phones, via iSync with Address book, iCal, Mail and/or Entourage.
One in particular is PocketMac GoBetween. I have a copy and, over the next couple of weeks, will be setting up a friend's system to use this. He will be using a nokia N95 but there are a large number of phones that are supported. Patches to iSync are needed for many. I shall try the S620 while I'm at it and will report back.
The GoBetween software comes to about £15 including vat.
Syncmate will sync your calendar and contacts for free
syncmate demo version or free version
If you have anything to add email me firstname.lastname@example.org