Can Startup Manager be used to boot Linux operating systems? This is a pretty simple question and I'm thinking the answer is no, but can Mac's Startup Manager be used to boot Linux based operating systems?  I'll probably end up installing a tool like rEFInd later on but I want to double check first.
It should work if you don't have FileVault and if you plan to install it on a partition (which you probably do). You can just hold alt/option and it should show Macintosh HD, Recovery HD, and Linux (or whatever you named it). You can cycle through with arrows and hit enter to confirm. If that doesn't work, you might just install rEFInd :(