There are at least 20+ similar apps that can be found in Mac App Store and other indie developers' websites, and most had been existed for a decades or two. It's not because that a system is not capable to do something, but you just didn't bother finding a solution.
BTW, I've tested Pixea before but I found Xsee3 (https://theunarchiver.com/xee) is way much faster. And for free and rich features, XnViewMP (https://www.xnview.com/en/xnviewmp/) is the best choice.
Bro, I faced same problem in past.
In my case, the crash was due to Graphics card and its OpenCL function. Pls run any OpenCL benchmark tool and it will crash.
Solution - 1. Change the Graphics card 2. I bought this app as temporary solution (good app) https://theunarchiver.com/xee
It's an image viewer for macOS to compete with Preview. I'm guessing the developer wanted the app to preview PSD files but had trouble extracting the image from the file. Here's the app now: https://theunarchiver.com/xee