Step 1

Download the latest final version of macOS Monterey directly from Apple servers by visiting a following website: https://mrmacintosh.com/macos-12-monterey-full-installer-database-download-directly-from-apple/

Upon downloading open dmg file and move Install macOS Monterey file to Applications folder.

Step 2

Insert the first USB stick to any USB port. It must be at least 16 GB in size.

From Finder menu click Go, then Utilites and double click Disk utility icon.

Select your USB stick from the left menu and click Erase button.

Type MyVolume in name field and select Mac OS Extended (Journaled) as format and GUID Partition Map as scheme. Then click Erase button to erase USB stick.

Step 3

Visit https://github.com/alphascorp/Monterey-micropatcher and click Code button then Download ZIP link.

The downloaded file should be automatically unpacked inside Downloads folder.

Step 4

In Finder choose Go, then Utilites and double-click Terminal icon to launch Terminal.

Step 5

Create bootable USB installer by typing a following command (all in one line), then press ENTER:

sudo /Applications/Install\ macOS\ Monterey.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume

Terminal will ask for password. Type your user password and press ENTER (password won't be shown not even under asterisk).

Creating bootable USB installer will take about 15-50 minutes depending on USB stick write speed.

Step 6

As soon creating bootable USB installer is finished type another commands in Terminal to patch it and press ENTER after each of these (every command in one line):

cd Downloads/Monterey-micropatcher-main

./micropatcher.sh

Step 7

Finally enter such command and press ENTER (all in one line):

./install-setvars.sh

Terminal will ask for users password (it won't be shown not even under asterisk).

Your first USB stick is now patched.

You can now safely remove it from the computer, but it will be needed later.

Step 8

Insert second USB stick and redo steps 3-5 to create another bootable Monterey USB stick.

Visit https://github.com/dortania/Opencore-Legacy-Patcher/releases website and download latest version of OpenCore-Patcher-GUI.app.zip file.

The downloaded file should be automatically unpacked inside Downloads folder.

Step 9

Go to Downloads folder, right click on OpenCore Patcher file and choose Open.

Step 10

Click Open button to run OpenCore Legacy Patcher.

Step 11

Upon launching OpenCore Legacy Patcher, click Settings icon and check Disable System Integrity Protection, Disable SecureBootModel and NVMe boot.

Step 12

Click Build and Install OpenCore, then select your USB stick and click Continue button.

Step 13

Enter your username password and click OK button to start patching.

Step 14

Finally click Quit button.

Step 15

Reboot your computer.

Press and hold Option key (on Mac keyboard) or ALT key (on Windows keyboard) and click an arrow under EFI boot icon.

Computer will launch OpenCore picker.

Step 16

This time click an arrow under Install macOS Monterey to start macOS Monterey installer.

Step 17

If you haven't created blank APFS partition needed for macOS Monterey yet, you can create one now by choosing Disk Utility.

Step 18

If you have APFS partition ready, you can select Install macOS Monterey and click Continue button to start the installation.

Continue macOS installation just like on a supported Mac. The system will reboot several times automatically during installation.

Step 19

When installation is ready you will be presented with Migration Assistant. Leave the default radio button as is and just click Continue button.

Step 20

Now you can move data from your old macOS installation. Click your previous macOS drive and then Continue button.

Step 21

As soon your data is moved you will see macOS Monterey desktop, you need to remove your second OpenCore USB stick and insert the first USB stick contaning Monterey-micropatacher.

Reboot the system holding Option key, Command key and P + R keys (on Mac keyboard) or ALT key, Windows key and P + R keys (on Windows keyboard).

Keep holding these until you hear loud Apple chime. Then immediately press and hold Option key (on Mac keyboard) or ALT key (on Windows keyboard) to see boot picker and click an arrow below EFI boot icon.

Computer will be turned off automatically. This will set all proper NVRAM values needed for macOS Monterey. You can now safely remove first USB stick as well.

Step 22

Power on the computer.

Once again press and hold Option key (on Mac keyboard) or ALT key (on Windows keyboard) to see boot picker, then click an arrow under MONTEREY (or other name you've choosed) to boot macOS Monterey. Enjoy!