diff --git a/docs/ja/reference_keymap_extras.md b/docs/ja/reference_keymap_extras.md
index e8104e5f3e6..fb9d167ae03 100644
--- a/docs/ja/reference_keymap_extras.md
+++ b/docs/ja/reference_keymap_extras.md
@@ -51,6 +51,7 @@ HID Keyboard/Keypad usage ページでは 256 未満の usage が定義されて
| Norwegian | `keymap_norwegian.h` |
| Polish | `keymap_polish.h` |
| Portuguese | `keymap_portuguese.h` |
+| Portuguese (macOS, ISO) | `keymap_portuguese_osx_iso.h` |
| Portuguese (Brazil) | `keymap_br_abnt2.h` |
| Romanian | `keymap_romanian.h` |
| Russian* | `keymap_russian.h` |
diff --git a/docs/reference_keymap_extras.md b/docs/reference_keymap_extras.md
index 7e3d9bf274f..f2abb4e596b 100644
--- a/docs/reference_keymap_extras.md
+++ b/docs/reference_keymap_extras.md
@@ -46,6 +46,7 @@ To use these, simply `#include` the corresponding [header file](https://github.c
|Norwegian |`keymap_norwegian.h` |
|Polish |`keymap_polish.h` |
|Portuguese |`keymap_portuguese.h` |
+|Portuguese (macOS, ISO) |`keymap_portuguese_osx_iso.h` |
|Portuguese (Brazil) |`keymap_br_abnt2.h` |
|Romanian |`keymap_romanian.h` |
|Russian* |`keymap_russian.h` |
diff --git a/quantum/keymap_extras/keymap_portuguese_osx_iso.h b/quantum/keymap_extras/keymap_portuguese_osx_iso.h
new file mode 100644
index 00000000000..b2e52063a97
--- /dev/null
+++ b/quantum/keymap_extras/keymap_portuguese_osx_iso.h
@@ -0,0 +1,234 @@
+/* Copyright 2020
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+
+#pragma once
+
+#include "keymap.h"
+
+// clang-format off
+
+/*
+ * ┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬─────┐
+ * │ § │ 1 │ 2 │ 3 │ 4 │ 5 │ 6 │ 7 │ 8 │ 9 │ 0 │ ' │ + │ │
+ * ├───┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬───┤
+ * │ │ Q │ W │ E │ R │ T │ Y │ U │ I │ O │ P │ º │ ´ │ │
+ * ├─────┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┐ │
+ * │ │ A │ S │ D │ F │ G │ H │ J │ K │ L │ Ç │ ~ │ \ │ │
+ * ├────┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴───┴──┤
+ * │ │ < │ Z │ X │ C │ V │ B │ N │ M │ , │ . │ - │ │
+ * ├────┴┬──┴─┬─┴───┼───┴───┴───┴───┴───┴───┼───┴─┬─┴──┬─────┤
+ * │ │ │ │ │ │ │ │
+ * └─────┴────┴─────┴───────────────────────┴─────┴────┴─────┘
+ */
+// Row 1
+#define PT_SECT KC_GRV // §
+#define PT_1 KC_1 // 1
+#define PT_2 KC_2 // 2
+#define PT_3 KC_3 // 3
+#define PT_4 KC_4 // 4
+#define PT_5 KC_5 // 5
+#define PT_6 KC_6 // 6
+#define PT_7 KC_7 // 7
+#define PT_8 KC_8 // 8
+#define PT_9 KC_9 // 9
+#define PT_0 KC_0 // 0
+#define PT_QUOT KC_MINS // '
+#define PT_PLUS KC_EQL // +
+// Row 2
+#define PT_Q KC_Q // Q
+#define PT_W KC_W // W
+#define PT_E KC_E // E
+#define PT_R KC_R // R
+#define PT_T KC_T // T
+#define PT_Y KC_Y // Y
+#define PT_U KC_U // U
+#define PT_I KC_I // I
+#define PT_O KC_O // O
+#define PT_P KC_P // P
+#define PT_MORD KC_LBRC // º
+#define PT_ACUT KC_RBRC // ´ (dead)
+// Row 3
+#define PT_A KC_A // A
+#define PT_S KC_S // S
+#define PT_D KC_D // D
+#define PT_F KC_F // F
+#define PT_G KC_G // G
+#define PT_H KC_H // H
+#define PT_J KC_J // J
+#define PT_K KC_K // K
+#define PT_L KC_L // L
+#define PT_CCED KC_SCLN // Ç
+#define PT_TILD KC_QUOT // ~ (dead)
+#define PT_BSLS KC_NUHS // (backslash)
+// Row 4
+#define PT_LABK KC_NUBS // <
+#define PT_Z KC_Z // Z
+#define PT_X KC_X // X
+#define PT_C KC_C // C
+#define PT_V KC_V // V
+#define PT_B KC_B // B
+#define PT_N KC_N // N
+#define PT_M KC_M // M
+#define PT_COMM KC_COMM // ,
+#define PT_DOT KC_DOT // .
+#define PT_MINS KC_SLSH // -
+
+/* Shifted symbols
+ * ┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬─────┐
+ * │ ± │ ! │ " │ # │ $ │ % │ & │ / │ ( │ ) │ = │ ? │ * │ │
+ * ├───┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬───┤
+ * │ │ │ │ │ │ │ │ │ │ │ │ ª │ ` │ │
+ * ├─────┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┐ │
+ * │ │ │ │ │ │ │ │ │ │ │ │ ^ │ | │ │
+ * ├────┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴───┴──┤
+ * │ │ > │ │ │ │ │ │ │ │ ; │ : │ _ │ │
+ * ├────┴┬──┴─┬─┴───┼───┴───┴───┴───┴───┴───┼───┴─┬─┴──┬─────┤
+ * │ │ │ │ │ │ │ │
+ * └─────┴────┴─────┴───────────────────────┴─────┴────┴─────┘
+ */
+// Row 1
+#define PT_PLMN S(PT_SECT) // ±
+#define PT_EXLM S(PT_1) // !
+#define PT_DQUO S(PT_2) // "
+#define PT_HASH S(PT_3) // #
+#define PT_DLR S(PT_4) // $
+#define PT_PERC S(PT_5) // %
+#define PT_AMPR S(PT_6) // &
+#define PT_SLSH S(PT_7) // /
+#define PT_LPRN S(PT_8) // (
+#define PT_RPRN S(PT_9) // )
+#define PT_EQL S(PT_0) // =
+#define PT_QUES S(PT_QUOT) // ?
+#define PT_ASTR S(PT_PLUS) // *
+// Row 2
+#define PT_FORD S(PT_MORD) // ª
+#define PT_GRV S(PT_ACUT) // ` (dead)
+// Row 3
+#define PT_CIRC S(PT_TILD) // ^ (dead)
+#define PT_PIPE S(PT_BSLS) // |
+// Row 4
+#define PT_RABK S(PT_LABK) // >
+#define PT_SCLN S(PT_COMM) // ;
+#define PT_COLN S(PT_DOT) // :
+#define PT_UNDS S(PT_MINS) // _
+
+/* Alted symbols
+ * ┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬─────┐
+ * │ │ │ @ │ € │ £ │ ‰ │ ¶ │ ÷ │ [ │ ] │ ≠ │ │ │ │
+ * ├───┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬───┤
+ * │ │ Œ │ ∑ │ Æ │ ® │ ™ │ ¥ │ † │ ı │ Ø │ π │ ° │ ¨ │ │
+ * ├─────┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┐ │
+ * │ │ Å │ ß │ ∂ │ ƒ │ ˙ │ ˇ │ ¯ │ „ │ ‘ │ ¸ │ ˜ │ ‹ │ │
+ * ├────┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴───┴──┤
+ * │ │ ≤ │ Ω │ « │ © │ √ │ ∫ │ ¬ │ µ │ “ │ … │ — │ │
+ * ├────┴┬──┴─┬─┴───┼───┴───┴───┴───┴───┴───┼───┴─┬─┴──┬─────┤
+ * │ │ │ │ │ │ │ │
+ * └─────┴────┴─────┴───────────────────────┴─────┴────┴─────┘
+ */
+// Row 1
+#define PT_APPL A(PT_1) // (Apple logo)
+#define PT_AT A(PT_2) // @
+#define PT_EURO A(PT_3) // €
+#define PT_PND A(PT_4) // £
+#define PT_PERM A(PT_5) // ‰
+#define PT_PILC A(PT_6) // ¶
+#define PT_DIV A(PT_7) // ÷
+#define PT_LBRC A(PT_8) // [
+#define PT_RBRC A(PT_9) // ]
+#define PT_NEQL A(PT_0) // ≠
+// Row 2
+#define PT_OE A(PT_Q) // Œ
+#define PT_NARS A(PT_W) // ∑
+#define PT_AE A(PT_E) // Æ
+#define PT_REGD A(PT_R) // ®
+#define PT_TM A(PT_T) // ™
+#define PT_YEN A(PT_Y) // ¥
+#define PT_DAGG A(PT_U) // †
+#define PT_DLSI A(PT_I) // ı
+#define PT_OSTR A(PT_O) // Ø
+#define PT_PI A(PT_P) // π
+#define PT_DEG A(PT_MORD) // °
+#define PT_DIAE A(PT_ACUT) // ¨ (dead)
+// Row 3
+#define PT_ARNG A(PT_A) // å
+#define PT_SS A(PT_S) // ß
+#define PT_PDIF A(PT_D) // ∂
+#define PT_FHK A(PT_F) // ƒ
+#define PT_DOTA A(PT_G) // ˙
+#define PT_CARN A(PT_H) // ˇ
+#define PT_MACR A(PT_J) // ¯
+#define PT_DLQU A(PT_K) // „
+#define PT_LSQU A(PT_L) // ‘
+#define PT_CEDL A(PT_CCED) // ¸
+#define PT_STIL A(PT_TILD) // ˜ (dead)
+#define PT_LSAQ A(PT_BSLS) // ‹
+// Row 4
+#define PT_LTEQ A(PT_LABK) // ≤
+#define PT_OMEG A(PT_Z) // Ω
+#define PT_LDAQ A(PT_X) // «
+#define PT_COPY A(PT_C) // ©
+#define PT_SQRT A(PT_V) // √
+#define PT_INTG A(PT_B) // ∫
+#define PT_NOT A(PT_N) // ¬
+#define PT_MICR A(PT_M) // µ
+#define PT_LDQU A(PT_COMM) // “
+#define PT_ELLP A(PT_DOT) // …
+#define PT_MDSH A(PT_MINS) // —
+
+/* Shift+Alted symbols
+ * ┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬─────┐
+ * │ │ ¡ │ fi │ fl │ ¢ │ ∞ │ • │ ⁄ │ { │ } │ ≈ │ ¿ │ ◊ │ │
+ * ├───┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬───┤
+ * │ │ │ │ │ │ │ │ ‡ │ ˚ │ │ ∏ │ │ ˝ │ │
+ * ├─────┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┐ │
+ * │ │ │ │ ∆ │ │ │ │ │ ‚ │ ’ │ ˛ │ ˆ │ › │ │
+ * ├────┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴───┴──┤
+ * │ │ ≥ │ │ » │ │ │ │ │ │ ” │ · │ – │ │
+ * ├────┴┬──┴─┬─┴───┼───┴───┴───┴───┴───┴───┼───┴─┬─┴──┬─────┤
+ * │ │ │ │ │ │ │ │
+ * └─────┴────┴─────┴───────────────────────┴─────┴────┴─────┘
+ */
+// Row 1
+#define PT_IEXL S(A(PT_1)) // ¡
+#define PT_FI S(A(PT_2)) // fi
+#define PT_FL S(A(PT_3)) // fl
+#define PT_CENT S(A(PT_4)) // ¢
+#define PT_INFN S(A(PT_5)) // ∞
+#define PT_BULT S(A(PT_6)) // •
+#define PT_FRSL S(A(PT_7)) // ⁄
+#define PT_LCBR S(A(PT_8)) // {
+#define PT_RCBR S(A(PT_9)) // }
+#define PT_AEQL S(A(PT_0)) // ≈
+#define PT_IQUE S(A(PT_QUOT)) // ¿
+#define PT_LOZN S(A(PT_PLUS)) // ◊
+// Row 2
+#define PT_DDAG S(A(PT_U)) // ‡
+#define PT_RNGA S(A(PT_I)) // ˚
+#define PT_NARP S(A(PT_P)) // ∏
+#define PT_DACU S(A(PT_ACUT)) // ˝
+// Row 3
+#define PT_INCR S(A(PT_D)) // ∆
+#define PT_SLQU S(A(PT_K)) // ‚
+#define PT_RSQU S(A(PT_L)) // ’
+#define PT_OGON S(A(PT_CCED)) // ˛
+#define PT_DCIR S(A(PT_TILD)) // ˆ (dead)
+#define PT_RSAQ S(A(PT_BSLS)) // ›
+// Row 4
+#define PT_GTEQ S(A(PT_LABK)) // ≥
+#define PT_RDAQ S(A(PT_X)) // »
+#define PT_RDQU S(A(PT_COMM)) // ”
+#define PT_MDDT S(A(PT_DOT)) // ·
+#define PT_NDSH S(A(PT_MINS)) // –
diff --git a/quantum/keymap_extras/sendstring_portuguese_osx_iso.h b/quantum/keymap_extras/sendstring_portuguese_osx_iso.h
new file mode 100644
index 00000000000..1799347f307
--- /dev/null
+++ b/quantum/keymap_extras/sendstring_portuguese_osx_iso.h
@@ -0,0 +1,100 @@
+/* Copyright 2020
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+
+// Sendstring lookup tables for Portuguese layouts
+
+#pragma once
+
+#include "keymap_portuguese_osx_iso.h"
+#include "quantum.h"
+
+// clang-format off
+
+const uint8_t ascii_to_shift_lut[16] PROGMEM = {
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+
+ KCLUT_ENTRY(0, 1, 1, 1, 1, 1, 1, 0),
+ KCLUT_ENTRY(1, 1, 1, 0, 0, 0, 0, 1),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 1, 1, 0, 1, 1, 1),
+ KCLUT_ENTRY(0, 1, 1, 1, 1, 1, 1, 1),
+ KCLUT_ENTRY(1, 1, 1, 1, 1, 1, 1, 1),
+ KCLUT_ENTRY(1, 1, 1, 1, 1, 1, 1, 1),
+ KCLUT_ENTRY(1, 1, 1, 0, 0, 0, 1, 1),
+ KCLUT_ENTRY(1, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 1, 1, 1, 0, 0)
+};
+
+const uint8_t ascii_to_altgr_lut[16] PROGMEM = {
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(1, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 1, 0, 1, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 1, 0, 1, 0, 0)
+};
+
+const uint8_t ascii_to_keycode_lut[128] PROGMEM = {
+ // NUL SOH STX ETX EOT ENQ ACK BEL
+ XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+ // BS TAB LF VT FF CR SO SI
+ KC_BSPC, KC_TAB, KC_ENT, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+ // DLE DC1 DC2 DC3 DC4 NAK SYN ETB
+ XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+ // CAN EM SUB ESC FS GS RS US
+ XXXXXXX, XXXXXXX, XXXXXXX, KC_ESC, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+
+ // ! " # $ % & '
+ KC_SPC, PT_1, PT_2, PT_3, PT_4, PT_5, PT_6, PT_QUOT,
+ // ( ) * + , - . /
+ PT_8, PT_9, PT_PLUS, PT_PLUS, PT_COMM, PT_MINS, PT_DOT, PT_7,
+ // 0 1 2 3 4 5 6 7
+ PT_0, PT_1, PT_2, PT_3, PT_4, PT_5, PT_6, PT_7,
+ // 8 9 : ; < = > ?
+ PT_8, PT_9, PT_DOT, PT_COMM, PT_LABK, PT_0, PT_LABK, PT_QUOT,
+ // @ A B C D E F G
+ PT_2, PT_A, PT_B, PT_C, PT_D, PT_E, PT_F, PT_G,
+ // H I J K L M N O
+ PT_H, PT_I, PT_J, PT_K, PT_L, PT_M, PT_N, PT_O,
+ // P Q R S T U V W
+ PT_P, PT_Q, PT_R, PT_S, PT_T, PT_U, PT_V, PT_W,
+ // X Y Z [ \ ] ^ _
+ PT_X, PT_Y, PT_Z, PT_8, PT_BSLS, PT_9, PT_TILD, PT_MINS,
+ // ` a b c d e f g
+ PT_ACUT, PT_A, PT_B, PT_C, PT_D, PT_E, PT_F, PT_G,
+ // h i j k l m n o
+ PT_H, PT_I, PT_J, PT_K, PT_L, PT_M, PT_N, PT_O,
+ // p q r s t u v w
+ PT_P, PT_Q, PT_R, PT_S, PT_T, PT_U, PT_V, PT_W,
+ // x y z { | } ~ DEL
+ PT_X, PT_Y, PT_Z, PT_8, PT_BSLS, PT_9, PT_TILD, KC_DEL
+};