Build: Update docs for plugin- and manufacturer-code

docs/CMake API.md

@@ -412,11 +412,13 @@ attributes directly to these creation functions, rather than adding them later.
 
 - `PLUGIN_MANUFACTURER_CODE`
   - A four-character unique ID for your company. For AU compatibility, this must contain at least
-    one upper-case letter.
+    one upper-case letter. GarageBand 10.3 requires the first letter to be upper-case, and the
+    remaining letters to be lower-case.
 
 - `PLUGIN_CODE`
-  - A four-character unique ID for your plugin. For AU compatibility, this must contain at least
-    one upper-case letter.
+  - A four-character unique ID for your plugin. For AU compatibility, this must contain exactly one
+    upper-case letter. GarageBand 10.3 requires the first letter to be upper-case, and the remaining
+    letters to be lower-case.
 
 - `DESCRIPTION`
   - A short description of your plugin.

examples/CMake/AudioPlugin/CMakeLists.txt

@@ -49,7 +49,8 @@ juce_add_plugin(AudioPluginExample
     # EDITOR_WANTS_KEYBOARD_FOCUS TRUE/FALSE    # Does the editor need keyboard focus?
     # COPY_PLUGIN_AFTER_BUILD TRUE/FALSE        # Should the plugin be installed to a default location after building?
     PLUGIN_MANUFACTURER_CODE Juce               # A four-character manufacturer id with at least one upper-case character
-    PLUGIN_CODE Dem0                            # A unique four-character plugin id with at least one upper-case character
+    PLUGIN_CODE Dem0                            # A unique four-character plugin id with exactly one upper-case character
+                                                # GarageBand 10.3 requires the first letter to be upper-case, and the remaining letters to be lower-case
     FORMATS AU VST3 Standalone                  # The formats to build. Other valid formats are: AAX Unity VST AU AUv3
     PRODUCT_NAME "Audio Plugin Example")        # The name of the final executable, which can differ from the target name
 

extras/Projucer/Source/Project/jucer_Project.cpp

@@ -1394,9 +1394,11 @@ void Project::createAudioPluginPropertyEditors (PropertyListBuilder& props)
     props.add (new TextPropertyComponent (pluginManufacturerValue, "Plugin Manufacturer", 256, false),
                "The name of your company (cannot be blank).");
     props.add (new TextPropertyComponent (pluginManufacturerCodeValue, "Plugin Manufacturer Code", 4, false),
-               "A four-character unique ID for your company. Note that for AU compatibility, this must contain at least one upper-case letter!");
+               "A four-character unique ID for your company. Note that for AU compatibility, this must contain at least one upper-case letter!"
+               " GarageBand 10.3 requires the first letter to be upper-case, and the remaining letters to be lower-case.");
     props.add (new TextPropertyComponent (pluginCodeValue, "Plugin Code", 4, false),
-               "A four-character unique ID for your plugin. Note that for AU compatibility, this must contain at least one upper-case letter!");
+               "A four-character unique ID for your plugin. Note that for AU compatibility, this must contain exactly one upper-case letter!"
+               " GarageBand 10.3 requires the first letter to be upper-case, and the remaining letters to be lower-case.");
     props.add (new TextPropertyComponent (pluginChannelConfigsValue, "Plugin Channel Configurations", 1024, false),
                "This list is a comma-separated set list in the form {numIns, numOuts} and each pair indicates a valid plug-in "
                "configuration. For example {1, 1}, {2, 2} means that the plugin can be used either with 1 input and 1 output, "