Apple's Help Book documentation suggests using a 16x16 icon for the icon pointed to by HPDBookIconPath:
https://developer.apple.com/library/mac/documentation/Carbon/Conceptual/ProvidingUserAssitAppleHelp/authoring_help/authoring_help_book.html#//apple_ref/doc/uid/TP30000903-CH206-CIHDHGCJ However, this will obviously be far too small on a Retina Display. So, I'm wondering what the current best practice is: 1. What size should we be using now for the HPDBookIconPath icon? Intuition would suggest 32x32, since that would be double the old guidelines, but Safari, Mail, and iTunes all seem to be using 64x64 icons. 2. Is there any way to specify separate icons for retina and non-retina resolutions? Does the icon.png and i...@2x.png trick work here, or should I just resign myself to giving the non-retina users a blurry icon? Thanks, Charles _______________________________________________ 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