F1 & F2 for screen brightness

What it means is you click on the F14 and F15 in the Keyboard> Shortcuts> Display panel on the right.

Open the System Preferences> Keyboard> Shortcuts> Display again.

Move your cursor over to the F14 and click once, then for a second time and the field will become editable.

Now press and hold the fn (function) key and then the F1 key, F14 will now be replaced by the shortcut F1

Do the same for the F15 field, click twice on it so it becomes editable, press and hold the fn (function) key

and press the F2 key.

Thanks for posting to the Apple Support Communities murray22,

We understand you want to be able to control screen brightness from your keyboard. From System Preferences > Keyboard > Shortcuts > Display, if you click where it currently shows "F14" and "F15" for screen brightness, the field will highlight, and you can assign a different key. If the key you want to assign is assigned to a different shortcut, you won't be able to use that key.

The following page offers additional guidance on keyboard shortcuts we think you'll find helpful: Use macOS keyboard shortcuts

Cheers!

Have you selected F1 and F2 for another function on your mac, that could be why you are getting the 'error' beep.

You will need to look through all your other Keyboard shortcuts to find out if they are being used for another function.

Normally if you select a new shortcut that is the same as another you get a yellow warning triangle, did you see that.

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