dual boot macos ubuntu

Enable SIP

1. Reboot into recovery mode: hold Command + R key while rebooting until the Apple logo appears
2. Select Utilities->Terminal to open a terminal
3. Type “csrutil enable” and hit Enter key
4. Reboot

1. Insert the bootable USB drive that you created earlier
2. Reboot. The rEFInd boot menu will show
3. Select EFI\BOOT\grubx64.rfi from {your USB drive name} and hit Enter
4. Select “Try Ubuntu MATE without installing”
5. After a few minutes or so, you should see the Ubuntu desktop
6. Click on Install Ubuntu MATE 20.04LTS
7. Follow the screens to complete the installation. IMPORTANT:

If MacOS is missing
You will need to have Wifi and internet access to reinstall macOS.

1. Booting the laptop.
2. If it prompts you to install a new OS, simply connect to your WiFi and follow the screen
3. Otherwise, reboot the laptop, holding both the Command and R keys until you see the Apple logo. Then select “Reinstall macOS” from the menu

If MacOS is present
If you know the password of the admin user, congratulations!. Otherwise, follow these steps to reset the password:

Requirements

1. A 4GB or larger USB flash drive to create a bootable image
2. (Optional but recommended) Another 4+GB USB drive or external HD to store the files that you will download later
3. At least 40GB free on the Mac HD

Downloading Files
Download the following files from labdoo@ftp.labdoo.org:/macOS-ubuntu: