Kip, I have found a solution for accessing photos from Apple products from within Affinity Photo.
Open Affinity Photo
Click view from main menu
Click Media Browser
Choose and open folder for: iPhoto, Photo, or Pictures folders. If they are not visible they can be dragged in using finder.
Thumbnails will appear which will make choosing easy
Select and click on picture (s) to open inAff.P
Also, go to Apple Preferences click, click extensions + Photos, then select all the Affinity extensions for editing photos. These will appear in iPhoto and Photos as extra editing aps for improved editing within your picture program.
Dave
