Add a note about receipt validation for the macOS store

If receipt validation were automated by Qt, it would not be very
resilient as copy protection. Since the documentation specifically
mentions that you should protect the validation code, we should
not encourage unsafe patterns and therefore we should not be handling
the copy protection code in Qt.

Task-number: QTBUG-52655
Change-Id: I3a75f0546d2e503775ca433e275e1714fa2e580a
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

1 files changed, 9 insertions, 0 deletions

diff --git a/doc/src/platforms/macos.qdoc b/doc/src/platforms/macos.qdoc
index 632620b8..a9a5f2a7 100644
--- a/doc/src/platforms/macos.qdoc
+++ b/doc/src/platforms/macos.qdoc
@@ -211,6 +211,15 @@
     \li \l{Qt for macOS - Deployment}
     \endlist
 
+    \note For selling applications in the macOS App Store, special rules apply.
+    In order to pass validation, the application must verify the existence of
+    a valid receipt before executing any code. Since this is a copy protection
+    mechanism, steps should be taken to avoid common patterns and obfuscate the
+    code that validates the receipt as much as possible. Thus, this cannot be
+    automated by Qt, but requires some platform-specific code written
+    specifically for the application itself. More information can be found in
+    \l{https://developer.apple.com/library/archive/releasenotes/General/ValidateAppStoreReceipt/Chapters/ValidateLocally.html}{Apple's documentation}.
+
     \section1 \macos Issues
 
     The page below covers specific issues and recommendations for creating