No, you cannot install CIPC natively on Mac OS X. This is unfortunate but is indeed the case. What Paolo is referring to is the ability to run CIPC on a Windows OS VM (e.g. VM Fusion). It works if you already run a Windows VM as part of your standard workflow but is indeed unappealling and downright useless if you run "all native".
Cisco does have a Jabber client for Mac that can be used as an IP Telephony softphone but that client requires a CUPS server or a Web Ex Connect account. I have not found a way to use the Jabber client as a soft phone only. If you have either of these services, then that is probably the way to go. I am using the client for WebEx but I have not tested with CUPS, yet.
If you find that neither approach works for you, then you can consider a 3rd party SIP client. I am currently wrapping up testing of CounterPath's Bria softphone. I will be posting a blog at some point in the next week. I have tested CounterPath's X-Lite (free version) on Mac (and Windows). I did a write up on that here:
http://www.netcraftsmen.net/blogs/tags/X-Lite/
The write up is based on an older X-Lite version. I have ran X-Lite 4 on Mac. The limits with the free version are the number of accounts that are supported, the audio/video codecs supported, and the fact it has an ad banner (which I hate, but that's me). Aside from the ad banner, I have found the app to be pretty usable but, as a 3rd party SIP device, it doesn't support all "native" CUCM features.
HTH.
Regards,
Bill
