I am starting in astrophotography. I want to create a "non star trail/track" result similar to what you would get with software like Deep Star Stacker in Windows, but I use MacOS.
Do I have any alternative (maybe with PS), that don't require running Windows in a virtual machine (VM)?
There are possibly several options available. From a cursory search, native Mac applications include:
If none of the Mac native applications do what you want, you're probably going to have to consider somehow running Windows programs. Your question rules out running Windows in a virtual machine, but you could also try the following options:
Wine: A not-emulator that provides a Windows-to-POSIX API compatibility layer to run (some) Windows applications on Linux and Mac systems. Not as reliable as a decent Windows VM, but requires less disk space and resources. Not all Windows applications will run under Wine.
Install Windows via BootCamp on your Mac, and run Windows natively. Of course, this requires a full installation of Windows on your hard drive (just like a Windows VM would). But this is the best-supported and highest-performing option of the three choices (VM; Wine; BootCamp) for running Windows applications on a Mac.
If none of the native Mac programs work, try some Windows programs under Wine. Reportedly, Deep Sky Stacker and Registax work under Wine. If they don't work, and you can't find Mac options, then you're going to have to resort to running Windows in BootCamp, if you don't want to run a Windows VM.
See also:
You might also look at Lynkeos (https://lynkeos.sourceforge.io). Although I haven't had a chance to explore its features, I do know it at least launches on macOS 10.15 (unlike some others). I have seen recently published (last month or newer) videos on YouTube where the software was being used to good effect. YMMV.
Years late for your question but, take a look at Siril. It's open source (free), and runs on Linux, Mac, Windows, and BSD.
