Topaz Studio 2 is useful photo editing software. However, the Topaz Studio 2 Photoshop plugin will not run natively on an M1 Mac. It took me a while to figure this out. I hope Topaz will update the app.
This is what Topaz says on its website:
The current Studio 2 plugin is NOT M1 native. You will need to run Photoshop in Rosetta to use this plugin with M1 native Photoshop. The plugin will not appear until you do so even if it has been installed correctly. You can automatically run Photoshop through Rosetta by going to the “Get Info” section when ctrl + clicking on the Photoshop icon in Applications and selecting the “Run With Rosetta” checkbox.
But I don’t want to run Photoshop with Rosetta. That’s a large part of the reason I bought an M1 Mac.