Download the latest Raspberry Pi OS Lite image from https://www.raspberrypi.com/software/operating-systems/ (2022-04-04 at the time of this writing).
Insert your microSD card. Use Raspberry Pi Imager to burn the image to your microSD card. Make to select "Set username and password" in the config before starting. Name the user pi and select your own password.
Ensure the disk is mounted again, then enable SSH.
$ touch /Volumes/boot/ssh