RemapKeyboard

https://lawrencexu13467.github.io/RemapKeyboard

This method has been successfully tested on a MacBook Pro 
late 2011 model running OS X 10.12.6, 
and can be applied to other machines as well.

Generally, Apple Service Providers need to 
replace the entire topcase if there are failures 
regarding the keyboard or trackpad. (Usually around $300)
No need to worry if that's not accidental damage, and 
your device is covered by Apple Care or other warranties.
However, for 'Out of Warranty' devices, instead of 
using an external keyboard or spending that much money 
on a topcase replacement, it might be helpful to swap and 
remap the keys.

Open 'Terminal' and Enter the command below:

$ hidutil property --set '{"UserKeyMapping":[{"HIDKeyboardModifierMappingSrc":0x70000000E,"HIDKeyboardModifierMappingDst":0x7000000E5},{"HIDKeyboardModifierMappingSrc":0x7000000E5,"HIDKeyboardModifierMappingDst":0x70000000E}]}'

Here, '0x70000000E' means key 'K' and '0x7000000E5' means key 'Right Shift'.
Keycode at the end of this page.

Make sure you replace all four key ids correspondingly:

HIDKeyboardModifierMappingSrc":<BROKEN_KEY>
HIDKeyboardModifierMappingDst":<NEW_KEY>
HIDKeyboardModifierMappingSrc":<BROKEN_KEY>
HIDKeyboardModifierMappingDst":<NEW_KEY>}]

You can check the status by the following command:

hidutil property --get "UserKeyMapping"

You can also reset the original layout:

hidutil property --set '{"UserKeyMapping":[]}'

Update:

You can also write a shell script with the above command and name it 'rmp.sh'. Use the Automator, 'Application' -> 'Run Shell Script'. On the right side, write:

#!/bin/bash
cd ~
./rmp.sh

Run and test it. Save it in the 'Application' folder.

Open 'System Preferences' -> 'Users and Groups' Click on the current user -> 'Login Items' Click '+' to add our script application into the list. Next time, when we boot the machine, the remapping would be done automatically.

KEY CODE

Keyboard a and A

0x04

Keyboard 5 and %

0x22

Keyboard F7

0x40

Keypad 6 and Right Arrow

0x5E

Keyboard b and B

0x05

Keyboard 6 and ^

0x23

Keyboard F8

0x41

Keypad 7 and Home

0x5F

Keyboard c and C

0x06

Keyboard 7 and &

0x24

Keyboard F9

0x42

Keypad 8 and Up Arrow

0x60

Keyboard d and D

0x07

Keyboard 8 and *

0x25

Keyboard F10

0x43

Keypad 9 and Page Up

0x61

Keyboard e and E

0x08

Keyboard 9 and (

0x26

Keyboard F11

0x44

Keypad 0 and Insert

0x62

Keyboard f and F

0x09

Keyboard 0 and )

0x27

Keyboard F12

0x45

Keypad . and Delete

0x63

Keyboard g and G

0x0A

Keyboard Return (Enter)

0x28

Keyboard Print Screen

0x46

Keyboard Non-US \ and |

0x64

Keyboard h and H

0x0B

Keyboard Escape

0x29

Keyboard Scroll Lock

0x47

Keyboard Application

0x65

Keyboard i and I

0x0C

Keyboard Delete (Backspace)

0x2A

Keyboard Pause

0x48

Keyboard Power

0x66

Keyboard j and J

0x0D

Keyboard Tab

0x2B

Keyboard Insert

0x49

Keypad =

0x67

Keyboard k and K

0x0E

Keyboard Spacebar

0x2C

Keyboard Home

0x4A

Keyboard F13

0x68

Keyboard l and L

0x0F

Keyboard - and _

0x2D

Keyboard Page Up

0x4B

Keyboard F14

0x69

Keyboard m and M

0x10

Keyboard = and +

0x2E

Keyboard Delete Forward

0x4C

Keyboard F15

0x6A

Keyboard n and N

0x11

Keyboard [ and {

0x2F

Keyboard End

0x4D

Keyboard F16

0x6B

Keyboard o and O

0x12

Keyboard ] and }

0x30

Keyboard Page Down

0x4E

Keyboard F17

0x6C

Keyboard p and P

0x13

Keyboard \ and |

0x31

Keyboard Right Arrow

0x4F

Keyboard F18

0x6D

Keyboard q and Q

0x14

Keyboard Non-US # and ~

0x32

Keyboard Left Arrow

0x50

Keyboard F19

0x6E

Keyboard r and R

0x15

Keyboard ; and :

0x33

Keyboard Down Arrow

0x51

Keyboard F20

0x6F

Keyboard s and S

0x16

Keyboard ' and "

0x34

Keyboard Up Arrow

0x52

Keyboard F21

0x70

Keyboard t and T

0x17

Keyboard Grave Accent and Tilde

0x35

Keypad Num Lock and Clear

0x53

Keyboard F22

0x71

Keyboard u and U

0x18

Keyboard , and "<"

0x36

Keypad /

0x54

Keyboard F23

0x72

Keyboard v and V

0x19

Keyboard . and ">"

0x37

Keypad *

0x55

Keyboard F24

0x73

Keyboard w and W

0x1A

Keyboard / and ?

0x38

Keypad -

0x56

Keyboard Left Control

0xE0

Keyboard x and X

0x1B

Keyboard Caps Lock

0x39

Keypad +

0x57

Keyboard Left Shift

0xE1

Keyboard y and Y

0x1C

Keyboard F1

0x3A

Keypad Enter

0x58

Keyboard Left Alt

0xE2

Keyboard z and Z

0x1D

Keyboard F2

0x3B

Keypad 1 and End

0x59

Keyboard Left GUI

0xE3

Keyboard 1 and !

0x1E

Keyboard F3

0x3C

Keypad 2 and Down Arrow

0x5A

Keyboard Right Control

0xE4

Keyboard 2 and @

0x1F

Keyboard F4

0x3D

Keypad 3 and Page Down

0x5B

Keyboard Right Shift

0xE5

Keyboard 3 and #

0x20

Keyboard F5

0x3E

Keypad 4 and Left Arrow

0x5C

Keyboard Right Alt

0xE6

Keyboard 4 and $

0x21

Keyboard F6

0x3F

Keypad 5

0x5D

Keyboard Right GUI

0xE7