diff --git a/keyboards/jj40/keymaps/ajp10304/keymap.c b/keyboards/jj40/keymaps/ajp10304/keymap.c
index e1c7e6b470f..be5ee9e3681 100644
--- a/keyboards/jj40/keymaps/ajp10304/keymap.c
+++ b/keyboards/jj40/keymaps/ajp10304/keymap.c
@@ -5,22 +5,28 @@
 
 extern keymap_config_t keymap_config;
 
-// Each layer gets a name for readability, which is then used in the keymap matrix below.
-// The underscores don't mean anything - you can have a layer called STUFF or any other name.
-// Layer names don't all need to be of the same length, obviously, and you can also skip them
-// entirely and just use numbers.
-#define _QWERTY 0
-#define _LOWER 1
-#define _RAISE 2
-#define _FUNC 3
-#define _ADJUST 16
-#define _DYN 6
+enum jj40_layers {
+  _QWERTY,
+  _MAC,
+  _LOWER,
+  _MLWR,
+  _RAISE,
+  _MRSE,
+  _FUNC,
+  _MFNC,
+  _ADJUST,
+  _DYN
+};
 
-enum planck_keycodes {
+enum jj40_keycodes {
   QWERTY = SAFE_RANGE,
+  MAC,
   FUNC,
+  MFNC,
   LOWER,
+  MLWR,
   RAISE,
+  MRSE,
   DYNAMIC_MACRO_RANGE
 };
 
@@ -117,10 +123,10 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
  * `-----------------------------------------------------------------------------------'
  */
 [_ADJUST] = KEYMAP(\
-  M(0),    RESET,   QWERTY,  _______, _______, _______, _______, _______,             _______,           _______,              _______,  KC_DEL  ,\
-  KC_CAPS, _______, _______, _______, _______, _______, _______, KC_AUDIO_MUTE,       KC_AUDIO_VOL_UP,   KC_MEDIA_PLAY_PAUSE,  _______,  _______ ,\
-  _______, _______, _______, _______, _______, _______, _______, KC_MEDIA_PREV_TRACK, KC_AUDIO_VOL_DOWN, KC_MEDIA_NEXT_TRACK,  _______,  _______ ,\
-  _______, _______, _______, _______, _______, _______, _______, _______,             MO(_DYN),          _______,              _______,  _______ \
+  M(0),     RESET,   QWERTY,  _______, _______, _______, _______, _______,             _______,           _______,              _______,  KC_DEL  ,\
+  KC_CAPS,  _______, _______, _______, _______, _______, _______, KC_AUDIO_MUTE,       KC_AUDIO_VOL_UP,   KC_MEDIA_PLAY_PAUSE,  _______,  _______ ,\
+  TG(_MAC), _______, _______, _______, _______, _______, _______, KC_MEDIA_PREV_TRACK, KC_AUDIO_VOL_DOWN, KC_MEDIA_NEXT_TRACK,  _______,  _______ ,\
+  _______,  _______, _______, _______, _______, _______, _______, _______,             MO(_DYN),          _______,              _______,  _______ \
 ),
 
 /* DYN: Macro Recording and Playback
@@ -139,11 +145,38 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
     _______,  _______, _______, _______, _______, DYN_MACRO_PLAY1, DYN_MACRO_PLAY2,  _______, _______, _______, _______, _______,\
     _______,  _______, _______, _______, _______, DYN_REC_STOP,    DYN_REC_STOP,     _______, _______, _______, _______, _______,\
     _______,  _______, _______, _______, _______, _______,         _______,          _______, _______, _______, _______, _______\
+),
+
+[_MAC]= KEYMAP(\
+    _______,  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,\
+    _______,  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,\
+    _______,  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,\
+    _______,  _______, _______, _______, MLWR,    _______, _______, MRSE,    _______, _______, _______, _______\
+),
+
+[_MLWR] = KEYMAP(\
+    _______,  _______,  _______,         _______, _______, _______, _______, _______, _______, _______, _______, _______,\
+    _______,  _______,  _______,         _______, _______, _______, _______, _______, _______, _______, _______, _______,\
+    _______,  KC_GRAVE, KC_NONUS_BSLASH, _______, _______, _______, _______, _______, _______, _______, _______, _______,\
+    _______,  _______,  _______,         _______, _______, _______, _______, _______, _______, _______, _______, _______\
+),
+
+[_MRSE] = KEYMAP(\
+    _______,  _______,  M(2),    _______, _______, _______, _______,       _______, _______, _______, _______,        _______       ,\
+    _______,  _______,  _______, _______, _______, _______, _______,       _______, _______, _______, _______,        LGUI(KC_EQL)  ,\
+    _______,  _______,  _______, _______, _______, _______, LALT(KC_LEFT), _______, _______, _______, LALT(KC_RIGHT), LGUI(KC_MINS) ,\
+    _______,  _______,  _______, _______, _______, _______, _______,       _______, _______, _______, _______,        _______       \
+),
+
+[_MFNC]= KEYMAP(\
+    _______,  _______,  _______,         _______, _______, _______, _______, _______, _______, _______, _______, _______             ,\
+    _______,  _______,  _______,         _______, _______, _______, _______, _______, _______, _______, _______, LGUI(KC_PENT)       ,\
+    _______,  KC_GRAVE, KC_NONUS_BSLASH, _______, _______, _______, _______, _______, _______, _______, _______, _______             ,\
+    _______,  _______,  _______,         _______, _______, _______, _______, _______, _______, _______, _______, _______             \
 )
 
 };
 
-
 void persistant_default_layer_set(uint16_t default_layer) {
   eeconfig_update_default_layer(default_layer);
   default_layer_set(default_layer);
@@ -179,10 +212,42 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
         update_tri_layer(_LOWER, _RAISE, _ADJUST);
       }
       return false;
-  }
+    case MLWR:
+      if (record->event.pressed) {
+        layer_on(_LOWER);
+        layer_on(_MLWR);
+        update_tri_layer(_LOWER, _RAISE, _ADJUST);
+      } else {
+        layer_off(_LOWER);
+        layer_off(_MLWR);
+        update_tri_layer(_LOWER, _RAISE, _ADJUST);
+      }
+      return false;
+    case MRSE:
+      if (record->event.pressed) {
+        layer_on(_RAISE);
+        layer_on(_MRSE);
+        update_tri_layer(_LOWER, _RAISE, _ADJUST);
+      } else {
+        layer_off(_RAISE);
+        layer_off(_MRSE);
+        update_tri_layer(_LOWER, _RAISE, _ADJUST);
+      }
+      return false;
+    case MFNC:
+      if (record->event.pressed) {
+        layer_on(_FUNC);
+        layer_on(_MFNC);
+      } else {
+        layer_off(_FUNC);
+        layer_off(_MFNC);
+      }
+      return false;
+    }
   return true;
 }
 
+
 const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt) {
   switch(id) {
     // These would trigger when you hit a key mapped as M(0)
@@ -201,6 +266,13 @@ const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt) {
             END
         );
       }
+    case 2: // Word Select - MAC
+      if (record->event.pressed) {
+        return MACRO(
+            DOWN(KC_LALT), DOWN(KC_RIGHT), UP(KC_RIGHT), DOWN(KC_LSFT), DOWN(KC_LEFT), UP(KC_LEFT), UP(KC_LSFT), UP(KC_LALT),
+            END
+        );
+      }
   }
   return MACRO_NONE;
 };
diff --git a/keyboards/jj40/keymaps/ajp10304/readme.md b/keyboards/jj40/keymaps/ajp10304/readme.md
index d35237c5d6f..406bb6ba2fa 100644
--- a/keyboards/jj40/keymaps/ajp10304/readme.md
+++ b/keyboards/jj40/keymaps/ajp10304/readme.md
@@ -1,12 +1,12 @@
 # AJP10304 Custom JJ40 Layout
 ###Based on my Planck layout of the same name.
 
-**Note:** In the tables below where there are two characters on a key, 
+**Note:** In the tables below where there are two characters on a key,
 the second is the output when shift is applied.
-  
+
 **Note:** The below tables assume a UK layout.
 
-##### Main Qwerty Layer 
+##### Main Qwerty Layer
 
 * Tab: when held, operates as shift.
 * Enter: when held, operates as shift.
@@ -33,7 +33,7 @@ Activated when `fn` held in the above `qwerty` layer.
 Activated when `Lower` is held in the above `qwerty` layer.
 
 * Numbers are along the top row, their shifted counterparts are on row 2.
-* WrdBks: `backspace` with `ctrl` applied. I.e. delete a word.  
+* WrdBks: `backspace` with `ctrl` applied. I.e. delete a word.
 * WrdDel: `delete` with `ctrl` applied. I.e. forward delete a word.
 
 |       |      |      |      |      |      |      |      |      |      |      |      |
@@ -42,45 +42,47 @@ Activated when `Lower` is held in the above `qwerty` layer.
 |  !    |   "  |   £  |   $  |   %  |   ^  |   &  |   *  |   (  |   )  |WrdDel|WrdBks|
 | Shift |  \|  |  `¬  |  #~  |  '@  |  -_  |  =+  |  #~  |  [{  |  ]}  |  '@  |Shift |
 |       |      |      |      |Lower | Del  |Space |      | Next | Vol- | Vol+ | Play |
- 
+
  ##### Raise Layer
  Activated when `Raise` is held in the above `qwerty` layer.
- 
+
  * Preferred layer for typing brackets.
  * Allows for cursor navigation to be used solely with the right hand.
  * WRDSEL: Select the word where the cursor is.
  * |< and >|: Apply `ctrl` to `left` and `right` respectively for word jumping.
 
-|       |      |      |      |      |      |       |      |      |      |       |      |      
-| :---: |:----:| :---:| :---:| :---:| :---:| :---: | :---:| :---:| :---:| :---: | :---:| 
+|       |      |      |      |      |      |       |      |      |      |       |      |
+| :---: |:----:| :---:| :---:| :---:| :---:| :---: | :---:| :---:| :---:| :---: | :---:|
 |   `   |      |WRDSEL|  [   |   ]  |      |       | PGUP | HOME |PGDOWN|       |PRNTSC|
 |   `   |      |      |  (   |   )  |      |       | HOME |  UP  | END  |       |ZOOM +|
 |       |      |      |  {   |   }  |      |&#124;<| LEFT | DOWN |RIGHT |>&#124;|ZOOM -|
-|       |      |      |      |      |  Alt | Enter |Raise |      |      |       |      |     
- 
+|       |      |      |      |      |  Alt | Enter |Raise |      |      |       |      |
+
 ##### Lower + Raise
 Activated when `Lower` and `Raise` are held together the above `qwerty` layer.
 
-* Audio controls in the same position as cursor keys from the `Raise` layer.  
+* Audio controls in the same position as cursor keys from the `Raise` layer.
 * ????: Runs a macro for outputting a text string.  Do not use this store passwords.
 * Reset: Enter bootloader for flashing firmware to the keyboard.
 * CAPS: Toggle caps lock.
 * DYN: Enter `DYN` layer.
+* MAC: Toggle MAC OS extensions to layers. This allows MLWR to be enabled with LOWER,
+MRSE with RAISE and MFNC with FUNC respectively.
 
-|       |      |      |      |      |      |      |      |      |      |      |      |      
-| :---: |:----:| :---:| :---:| :---:| :---:| :---:| :---:| :---:| :---:| :---:| :---:| 
+|       |      |      |      |      |      |      |      |      |      |      |      |
+| :---: |:----:| :---:| :---:| :---:| :---:| :---:| :---:| :---:| :---:| :---:| :---:|
 | ????  | Reset|Qwerty|      |      |      |      |      |      |      |      |  Del |
 | CAPS  |      |      |      |      |      |      | Mute | Vol+ | Play |      |      |
-|       |      |      |      |      |      |      | Prev | Vol- | Next |      |      |
+| MAC   |      |      |      |      |      |      | Prev | Vol- | Next |      |      |
 |       |      |      |      |      |      |      |      | DYN  |      |      |      |
- 
+
 ##### DYN
 Activated when `DYN` held along with `Lower` and `Raise`
-Allows recording of macros.  To start recording the macro, press either REC1 or REC2. 
-To finish the recording, press STOP. To replay the macro, press either PLAY1 or PLAY2.  
+Allows recording of macros.  To start recording the macro, press either REC1 or REC2.
+To finish the recording, press STOP. To replay the macro, press either PLAY1 or PLAY2.
 
-|       |      |      |      |      |      |      |      |      |      |      |      |      
-| :---: | :---:| :---:| :---:| :---:| :---:| :---:| :---:| :---:| :---:| :---:| :---:| 
+|       |      |      |      |      |      |      |      |      |      |      |      |
+| :---: | :---:| :---:| :---:| :---:| :---:| :---:| :---:| :---:| :---:| :---:| :---:|
 |       |      |      |      |      | REC1 | REC2 |      |      |      |      |      |
 |       |      |      |      |      | PLAY1| PLAY2|      |      |      |      |      |
 |       |      |      |      |      | STOP | STOP |      |      |      |      |      |
diff --git a/keyboards/planck/keymaps/ajp10304/keymap.c b/keyboards/planck/keymaps/ajp10304/keymap.c
index da1b5e8edad..18a3f486d1f 100644
--- a/keyboards/planck/keymaps/ajp10304/keymap.c
+++ b/keyboards/planck/keymaps/ajp10304/keymap.c
@@ -5,22 +5,28 @@
 
 extern keymap_config_t keymap_config;
 
-// Each layer gets a name for readability, which is then used in the keymap matrix below.
-// The underscores don't mean anything - you can have a layer called STUFF or any other name.
-// Layer names don't all need to be of the same length, obviously, and you can also skip them
-// entirely and just use numbers.
-#define _QWERTY 0
-#define _LOWER 1
-#define _RAISE 2
-#define _FUNC 3
-#define _ADJUST 16
-#define _DYN 6
+enum planck_layers {
+  _QWERTY,
+  _MAC,
+  _LOWER,
+  _MLWR,
+  _RAISE,
+  _MRSE,
+  _FUNC,
+  _MFNC,
+  _ADJUST,
+  _DYN
+};
 
 enum planck_keycodes {
   QWERTY = SAFE_RANGE,
+  MAC,
   FUNC,
+  MFNC,
   LOWER,
+  MLWR,
   RAISE,
+  MRSE,
   DYNAMIC_MACRO_RANGE
 };
 
@@ -117,10 +123,10 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
  * `-----------------------------------------------------------------------------------'
  */
 [_ADJUST] = {
-  {M(0),    RESET,   QWERTY,  _______, _______, _______, _______, _______,             _______,           _______,              _______,  KC_DEL  },
-  {KC_CAPS, _______, _______, _______, _______, _______, _______, KC_AUDIO_MUTE,       KC_AUDIO_VOL_UP,   KC_MEDIA_PLAY_PAUSE,  _______,  _______ },
-  {_______, _______, _______, _______, _______, _______, _______, KC_MEDIA_PREV_TRACK, KC_AUDIO_VOL_DOWN, KC_MEDIA_NEXT_TRACK,  _______,  _______ },
-  {_______, _______, _______, _______, _______, _______, _______, _______,             MO(_DYN),          _______,              _______,  _______ }
+  {M(0),     RESET,   QWERTY,  _______, _______, _______, _______, _______,             _______,           _______,              _______,  KC_DEL  },
+  {KC_CAPS,  _______, _______, _______, _______, _______, _______, KC_AUDIO_MUTE,       KC_AUDIO_VOL_UP,   KC_MEDIA_PLAY_PAUSE,  _______,  _______ },
+  {TG(_MAC), _______, _______, _______, _______, _______, _______, KC_MEDIA_PREV_TRACK, KC_AUDIO_VOL_DOWN, KC_MEDIA_NEXT_TRACK,  _______,  _______ },
+  {_______,  _______, _______, _______, _______, _______, _______, _______,             MO(_DYN),          _______,              _______,  _______ }
 },
 
 /* DYN: Macro Recording and Playback
@@ -141,8 +147,36 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
     {_______,  _______, _______, _______, _______, _______,         _______,          _______, _______, _______, _______, _______}
 },
 
-};
 
+[_MAC]= {
+    {_______,  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______},
+    {_______,  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______},
+    {_______,  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______},
+    {_______,  _______, _______, _______, MLWR,    _______, _______, MRSE,    _______, _______, _______, _______}
+},
+
+[_MLWR] = {
+    {_______,  _______,  _______,         _______, _______, _______, _______, _______, _______, _______, _______, _______},
+    {_______,  _______,  _______,         _______, _______, _______, _______, _______, _______, _______, _______, _______},
+    {_______,  KC_GRAVE, KC_NONUS_BSLASH, _______, _______, _______, _______, _______, _______, _______, _______, _______},
+    {_______,  _______,  _______,         _______, _______, _______, _______, _______, _______, _______, _______, _______}
+},
+
+[_MRSE] = {
+    {_______,  _______,  M(2),    _______, _______, _______, _______,       _______, _______, _______, _______,        _______       },
+    {_______,  _______,  _______, _______, _______, _______, _______,       _______, _______, _______, _______,        LGUI(KC_EQL)  },
+    {_______,  _______,  _______, _______, _______, _______, LALT(KC_LEFT), _______, _______, _______, LALT(KC_RIGHT), LGUI(KC_MINS) },
+    {_______,  _______,  _______, _______, _______, _______, _______,       _______, _______, _______, _______,        _______       }
+},
+
+[_MFNC]= {
+    {_______,  _______,  _______,         _______, _______, _______, _______, _______, _______, _______, _______, _______             },
+    {_______,  _______,  _______,         _______, _______, _______, _______, _______, _______, _______, _______, LGUI(KC_PENT)       },
+    {_______,  KC_GRAVE, KC_NONUS_BSLASH, _______, _______, _______, _______, _______, _______, _______, _______, _______             },
+    {_______,  _______,  _______,         _______, _______, _______, _______, _______, _______, _______, _______, _______             }
+},
+
+};
 
 void persistant_default_layer_set(uint16_t default_layer) {
   eeconfig_update_default_layer(default_layer);
@@ -179,10 +213,42 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
         update_tri_layer(_LOWER, _RAISE, _ADJUST);
       }
       return false;
-  }
+    case MLWR:
+      if (record->event.pressed) {
+        layer_on(_LOWER);
+        layer_on(_MLWR);
+        update_tri_layer(_LOWER, _RAISE, _ADJUST);
+      } else {
+        layer_off(_LOWER);
+        layer_off(_MLWR);
+        update_tri_layer(_LOWER, _RAISE, _ADJUST);
+      }
+      return false;
+    case MRSE:
+      if (record->event.pressed) {
+        layer_on(_RAISE);
+        layer_on(_MRSE);
+        update_tri_layer(_LOWER, _RAISE, _ADJUST);
+      } else {
+        layer_off(_RAISE);
+        layer_off(_MRSE);
+        update_tri_layer(_LOWER, _RAISE, _ADJUST);
+      }
+      return false;
+    case MFNC:
+      if (record->event.pressed) {
+        layer_on(_FUNC);
+        layer_on(_MFNC);
+      } else {
+        layer_off(_FUNC);
+        layer_off(_MFNC);
+      }
+      return false;
+    }
   return true;
 }
 
+
 const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt) {
   switch(id) {
     // These would trigger when you hit a key mapped as M(0)
@@ -201,6 +267,13 @@ const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt) {
             END
         );
       }
+    case 2: // Word Select - MAC
+      if (record->event.pressed) {
+        return MACRO(
+            DOWN(KC_LALT), DOWN(KC_RIGHT), UP(KC_RIGHT), DOWN(KC_LSFT), DOWN(KC_LEFT), UP(KC_LEFT), UP(KC_LSFT), UP(KC_LALT),
+            END
+        );
+      }
   }
   return MACRO_NONE;
 };
diff --git a/keyboards/planck/keymaps/ajp10304/readme.md b/keyboards/planck/keymaps/ajp10304/readme.md
index 8f9edbcc2db..69b08ed511a 100644
--- a/keyboards/planck/keymaps/ajp10304/readme.md
+++ b/keyboards/planck/keymaps/ajp10304/readme.md
@@ -65,12 +65,14 @@ Activated when `Lower` and `Raise` are held together the above `qwerty` layer.
 * Reset: Enter bootloader for flashing firmware to the keyboard.
 * CAPS: Toggle caps lock.
 * DYN: Enter `DYN` layer.
+* MAC: Toggle MAC OS extensions to layers. This allows MLWR to be enabled with LOWER, 
+MRSE with RAISE and MFNC with FUNC respectively.
 
 |       |      |      |      |      |      |      |      |      |      |      |      |      
 | :---: |:----:| :---:| :---:| :---:| :---:| :---:| :---:| :---:| :---:| :---:| :---:| 
 | ????  | Reset|Qwerty|      |      |      |      |      |      |      |      |  Del |
 | CAPS  |      |      |      |      |      |      | Mute | Vol+ | Play |      |      |
-|       |      |      |      |      |      |      | Prev | Vol- | Next |      |      |
+| MAC   |      |      |      |      |      |      | Prev | Vol- | Next |      |      |
 |       |      |      |      |      |      |      |      | DYN  |      |      |      |
  
 ##### DYN