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Downgrade macOS on Intel Machines
To revert your Mac to an older macOS version that is older than the current version, follow the steps below.
- On the target Mac, hold the Option key and press the power button once to power up the Intel Mac. Continue holding Option until the startup screen appears.
- Boot into Internet Recovery by holding down Command + Shift + Option + R. This will boot into the oldest macOS recovery for that machine.
- Once in Recovery, open Terminal and run the workflow with your required macOS installer.
Note: Use a Thunderbolt 2 to Ethernet adapter on laptops and built-in Ethernet to boot Internet Recovery in 3 to 5 minutes. Booting to Internet Recovery over Wi-Fi takes 20-35 minutes.
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