I use PixInsight, I've used Photoshop and Deep Sky Stacker as well, but I find PixInsight to be the best now.
Mac, Linux, and Windows. I use on Mac.
The user interface is identical on all platforms because they create their own interface environment (it doesn't look native to the OS). Getting to learn to use it can be confusing but once you get used to it, it becomes easier and easier to learn new parts of the program.
It does have a bit of a learning curve (it's not obvious what you should do when using it.)
The IP4AP.com site is well-known among Pixinsight users for their tutorials.
Thanks guys! Now i just need to be lucky so that i can get clear night 







