The Narrowband Channel | Deep Sky Stacker for Mac and Workflow with Narrowband Mono Images @TheNarrowbandChannel | Uploaded June 2020 | Updated October 2024, 1 hour ago.
Here is my workflow using a Mac to stack my images. Deep Sky Stacker is a great stacking platform and it is very popular. The workflow is easy and my only complaint is that I cannot stack mono mages with all three channels at once as you can in some paid for software.

Here is the website. It is a trustworthy download. If you have issues comment to let me know and I can fix the link if needed.
starchaser.de/deepskystacker-fuer-mac-osx