toby01@hughes.net

Can you make sure you are using the latest version of Affinity Photo (1.8.4) and also try changing the RAW engine photo is using. To do this open a RAW file and click View>Assistant Manager and you'll see an option for the RAW Engine, on Mac we have the choice of two, so if it's currently on Serif LABS, change this to Apple Core Image RAW and then close that window, close your raw file and reopen it. If it's currently on Apple Core Image RAW, change this to Serif LABS. Both can open files from the Z7, so this should work regardless.

NEF files not working from Z7 other NEF D3 & D500 work