Gulps, I can get Family Historian for about £36.
However, Family Tree Maker is far more expensive at just under £90. I won't be spending that sort of money so I shall have to find something else to give him!
Edit: I have found you can buy Mac Family Tree 9 from Apple store for under £30.
https://apps.apple.com/gb/app/macfam...58866808?mt=12
Does anyone have any experience of this?