MacBook Pro (15-inch, Mid 2012)

Guide on how to install Big Sur on A1425

Step 0:

  • Please make sure you have Catalina as your main OS and a second partition separate for Big Sur. Make sure they’re not in the same container.

Step 1:

  • Download the PKG file

  • Open and run it.

  • Check that you indeed have Mac OS Beta Install.app in the Applications Folder.

Step 2:

  • Boot into Recovery Mode (Reboot and hold CMD+R)

  • Open Terminal

  • Type in “csrutil disable”

  • Type in “reboot”

Step 3:

Step 4:

  • Open Terminal and paste this command: “sudo defaults write /Library/Preferences/com.apple.security.libraryvalidation.plist DisableLibraryValidation -bool true”

  • Now paste this: “launchctl setenv DYLD_INSERT_LIBRARIES $PWD/Hax.dylib”

Step 5:

  • Open MacOS Beta Install

  • Install it (The process might take a long time, you might feel like it’s stuck but it’s not)

  • If see the no entry icon, everything is installed.

Step 6:

  • Go back to Catalina

  • Open Terminal

  • Type in: nvram boot-args=”-no_compat_check amfi_get_out_of_my_way=1″ (If this doesn’t work then go to Recovery Mode (CMD+R) and do it from there)

Step 7:

  • Boot back into Big Sur

  • Complete installation. (It might take a long time once again)

  • Enjoy!

Step 8 (Fix Wi-Fi):

Credits to u/ASentientBot for figuring out the patch method