-# Make space the last number is the size that MacOS instatllation should consume
-diskutil apfs resizeContainer disk0s2 200GB
+# Make space. The last number is the size that MacOS instatllation should
+# consume. The minimum recommended is 100 GB to be able to apply updates later
+# on easily.
+
+diskutil apfs resizeContainer disk0s2 100GB
+
+# Run the installer, select MacOS 12.1 as stub OS version, in the boot picker
+# you're supposed to click Restart than return to the shell and wait until the
+# installer is finished and press Return to shutdown your system.