On a Mac you do not need a Guitar Tuner.
Garage Band has it. So if you do not mind switching to GB for a couple of minutes...
you do not need anything else.
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Even if you have removed GB from your Mac,
upon connecting your guitar, Tuning happens automatically.
Because a Mac... Just Works.
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Live emits a 440Hz Tone that you can change.
If you know the frequency of notes then you can change them and use it as a tuner (Diapason-Like)
http://www.phy.mtu.edu/~suits/notefreqs.html
http://www.phys.unsw.edu.au/jw/notes.html
Mac Studio M1
Live 12 Suite,Zebra ,Valhalla Plugins, MIDI Guitar (2+3),Guitar, Bass, VG99, GP10, JV1010 and some controllers
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Music :
http://alonetone.com/pasha