My personal ports of Astronomical Windows softwares to Mac OS X thanks to Wineskin…
http://www.astronomie.be/registax/
>>>> Registax 6 for Mac <<<<
http://www.astrosurf.com/buil/iris/iris.htm
>>>> Iris for Mac <<<<
http://www.autostakkert.com
>>>> AutoStakkert 2 for Mac <<<<