Could anyone recommend a top planetary capture software for the MAC OS?
I have been told AstroImager is more deep space but has added functionality needed for planetary.
Fire Capture has a MAC OS version but even carefully following the instructions I could not get the software to install on my computer.
Has anyone ever run into any software creators that one might be careful about, as a potential malware risk?
There are a few options available. One is AstroImager as you have suggested. In the preferences you can set it to stream video instead of taking stills. Or you can set a really high frame rate/exposure and capture series of stills, but it's only going to go as fast as your USB can write.
Another option is OACapture. Which is just for planetary.
And yet another one on the scene is Planetary Imager, which was developed on Linux and ported to OS X, and is also primarily for planetary capture.
As for processing, at the moment, there's not a lot of good choices. Lynkeos is one option. Another is Keiths Image Stacker. Neither are very modern, and have not been updated in some time. I currently use AutoStakkert by dual booting into Windows. Planetary processing seems to be the only lacking area on the Mac currently.