Bingo! I had one image resource with a resource fork. Not sure why this wasn’t picked up in my previous builds though, since I was compiling on 10.11. But that does seem to have been the issue.
Thanks to Alex for his unending patience offline sifting through all the signing certificate issues, which were probably a red herring after all. —Graham > On 19 Jun 2017, at 1:58 pm, Shane Stanley <sstan...@myriad-com.com.au> wrote: > > On 19 Jun 2017, at 1:06 pm, Graham Cox <graham....@bigpond.com> wrote: >> >> resource fork, Finder information, or similar detritus not allowed > > See: <https://developer.apple.com/library/content/qa/qa1940/_index.html> _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com