Same deal as this time last year. While not as fully featured as Photoshop, it's a good alternative for most people (especially for the price). According to Twitter the deal ends a little after christmas.
Speel
With a wide range of professional-grade, nondestructive image editing tools, Pixelmator Pro lets you bring out the best in your photos, create gorgeous compositions and designs, draw, paint, apply stunning effects, design beautiful text, and edit images in just about any way you can imagine. And thanks to its intuitive and accessible design, Pixelmator Pro is delightfully easy to use — whether you’re just starting out with image editing or you’re a seasoned pro.
Exceptional Design and Functionality
• The modern, single-window interface of Pixelmator Pro is designed exclusively for working with images on a Mac
• An intuitive and refined design makes image editing easy and accessible, even if you're a complete beginner
• Native dark and light appearances adapt to the light and dark modes of macOS
• A customizable interface lets you organize your creative environment just the way you want
• Choose from workspace presets created for photography, design, illustration, and painting
• A full-featured Photos extension lets you edit images using Pixelmator Pro without ever leaving Photos, saving layered, nondestructive edits directly to your library
Absolutely love Pixelmator. I’ve paid a total of $70 (as a guess) for Pixelmator and then Pixelmator Pro a few years later and it’s a great alternative to Photoshop if you’re not in the industry (and maybe even if you are? Couldn’t say)
They’re always quick to update for new macOS versions and architectures, implementing cool ML features and stuff.