Although I'm nowhere near experienced with with astro-related work, I am an experienced Mac user. I found a lot of useful information here:
http://www.cloudynights.com/item.php?item_id=1044
I use AstroIIDC for both video capture of solar system objects and tracking for long exposure DSLR work. AstroIIDC is compatible with many cameras, both high end and low end. It is only compatible with Firewire cameras. For auto tracking, this is from the website:
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Provides Auto Guiding on stars, planets, lunar craters and solar sunspots utilizing KeySpan's USB to Serial Port converter and Shoestring Astronomy's GPUSB ST4 converter for mount control. Supported mounts include Meade compatible (including LXD55, LXD75, ETX90, ETX125, LX200, RX400, SkySensor 2000 PC etc.), Losmady, Celestron, Meade, Temma, Vixen, SkyWatcher and other mounts that have a ST4 type Auto Guider port and hacked hand controllers (Orion EQ2/3, CGE5 etc.).
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AstroIIDC is here:
http://www.outcastsoft.com/ASCASTROIIDC.html
For stacking I tried AstroStack, Keith's Image Stacker, and Lynkos. I've been using Lynkos. It automatically aligns and stacks any quicktime compatible video and 16-bit tiffs. It also applies Flats and Darks.
Links to these processing programs are provided on the CloudyNights page I linked above.
I hope this helps!!