add: macOS pairing instructions

Credit: @stossy11

Author: polymo1

docs/getting-started/pairing-file.mdx

@@ -26,9 +26,15 @@ On Windows, you might have to execute the program using Command Prompt or Powers
 7. From there, type `./jitterbugpair.exe` and press enter while your device is plugged in.
 
 <!-- Credit: Stossy11 -->
-<!-- ### macOS -->
-
+### macOS
 
+1. Download Jitterbugpair then Double Click it to extract the zip file.
+2. Find the Extracted jitterbugpair file. (it should have a black and green icon)
+3. Open Terminal. (In launchpad its in the "Utilities" folder)
+4. Drag the jitterbugpair file into Terminal and press "Return" or Enter. (Make sure your device is plugged in)
+    * If you get "macOS cannot verify that this app is free from malware" put into terminal `xattr ` (with a space after) then drag jitterbugpair then press enter. after that try doing step number 4 again.
+5. Transfer this file to your device in a way of your choosing.
+    * Transferring using cloud storage may change the file's extension (most likely turning into a .txt file), so be careful. It is also possible to change the extension to `.plist` for use with older SideStore versions, like `0.1.1`.
 
 ### Linux