January 2022 • Macworld 63HOW TO BOOT FROM THE
INSTALLER DRIVE- With the external drive plugged in:
Intel Mac: Restart/power up the Mac
and hold down the option key on the
keyboard during the boot process.
Apple silicon Mac: Restart/power
up the Mac and hold down the Mac’s
power button during the boot process.
- The Start-up Manager should
appear. Select your external drive.
It should appear as ‘Install macOS
Monterey’. - The Mac will boot into Recovery
mode and the installer will launch
automatically. You can Continue one
with the installation from here. If you
want to erase the drive first, quit the
installer and run Disk Utility from
the Recovery menu. You can then
erase the drive, and then go back
to the Recovery menu and install
macOS Monterey.IF YOUR MAC WON’T BOOT
FROM THE INSTALLER
Macs with a T2 security chip (Intel
Macs made since 2018) may not let
you boot from the macOS Monterey
installer. (Here’s a list of Macs with
T2.) To fix this, there’s a setting in the
Security Start-up Utility that needs to
be adjusted. Here’s how to do it.- Boot into Recovery mode by
pressing Command+R while you turn
on the Mac.
2. A list of users will
appear. You need to select
an account that you know
the password for.
3. When the Mac is done
booting, select the Utilities
menu, and then select
Start-up Security Utility.
4. You may be asked
to authenticate. Enter
macOS Password, then
choose an administrator
account and enter the
password.