Mac AppStore entitlements are supported, but not Mac App Image entitlements.

In the MacAppImageBuilder.java:

                args.addAll(Arrays.asList("codesign",
                        "-s", signingIdentity, // sign with this key
                        "--prefix", identifierPrefix, // use the identifier as a prefix
                        "-vvvv"));
                if (entitlementsFile != null &&
                        (p.toString().endsWith(".jar")
                                || p.toString().endsWith(".dylib"))) {
                    args.add("--entitlements");
                    args.add(entitlementsFile); // entitlements
                } else if (inheritedEntitlements != null && Files.isExecutable(p)) {
                    args.add("--entitlements");
                    args.add(inheritedEntitlements); // inherited entitlements for executable processes
                }
                if (keyChain != null && !keyChain.isEmpty()) {
                    args.add("--keychain");
                    args.add(keyChain);
                }

entitlementsFile is always null as it's passed in. Entitlements needs to be enabled for App Image, they are currently only enabled for Mac App Store Apps.

            String signingIdentity = MAC_APP_STORE_APP_SIGNING_KEY.fetchFrom(p);
            String identifierPrefix = BUNDLE_ID_SIGNING_PREFIX.fetchFrom(p);
            String entitlementsFile = getConfig_Entitlements(p).toString();
            String inheritEntitlements = getConfig_Inherit_Entitlements(p).toString();

            MacAppImageBuilder.signAppBundle(p, appLocation.toPath(), signingIdentity, identifierPrefix, entitlementsFile, inheritEntitlements);