In light of today's Apple Mac Pro announcements, I'll chime in...
Problem: Building macOS desktop applications as an indie-developer.
Project: Fileloupe for Mac and Videoloupe for Mac
Fileloupe is a lightweight media browser that I actually announced on Hacker News a few years back. Videoloupe was just released and is a video player/editor in the spirit of the older QuickTime Pro 7. I work on both of these full-time and I'm currently in a coffee shop in Bangkok. The jury is still out whether or not being a macOS indie developer is sustainable...