How to set default startup disk from Mac Startup Manager?

Question

When starting a Mac computer, the option key can be held down to invoke the Startup Manager. From here, choices are given for possible boot volumes. Is there a way to make the selected volume the new default boot volume?

I wish to boot volumes other than just Windows and OS X. This was possible from OS X System Preferences before El Capitan (OS X 10.11). System Integrity Protection (SIP) now prevents this. Since the Startup Manager ignores SIP and also detects more boot volumes than System Preferences, I now desire to use the Startup Manager to set the default startup volume.

Solution

Go to System Preferences → Startup Disk → Choose the disk and restart

The next time you start up or restart your computer, your Mac starts up using the operating system on the selected volume.

Another trick which I cannot verify is to hold Ctrl and then Click on the disk after invoking startup manager at boot time. If the trick works, ↑ upwards pointing arrow should turn into a circle.

Comments

[Scott - Слава Україні]

I'm confused. If you don't want a System Preferences solution, why have you accepted pun's answer?

[Scott - Слава Україні]

Am I still confused? More than ever!

[David Anderson]

Just out of curiosity, why can you not verify holding down the control key after invoking the Start Up manager?

[clhy]

@DavidAnderson I haven't tried that method ever and can't try it now as I am using Ubuntu. Read about it at some reliable sources so posted it with a disclaimer.

[David Anderson]

I verified the method works on a 2007 iMac and a 2011 iMac. The method did not work on a 2006 iMac. My guess would be that it works on most, if not all, newer Mac models.

[Jan Bergström]

Well the ctrl-key and mouse selection worked (in my Mac Mini 2012 with Catalina (max Apple upgrade) and I have two HD (now using it as an excellent home (max 1440p TV) Win10-computer). Boots steady on the Win10 disk after the selection with ctrl-key.