Upgrade by cloning instructions are only for PC
See https://tails.boum.org/upgrade/clone/.
I think that I did this on purpose as a simplification: the people who follow our instructions to upgrade by cloning already have another Tails and probably know how to start it on their computer.
Still, if we wanted to tackle this better we could:
A. Not give detailed starting instructions neither for PC nor Mac and point to https://tails.boum.org/doc/first_steps/start/pc/ and https://tails.boum.org/doc/first_steps/start/mac/ instead.
B. Add a note about Mac pointing to https://tails.boum.org/doc/first_steps/start/mac/.
C. Have 2 different pages.
I think that my preferred option is A, but we should check how easily it could be done in our complex installation instructions.
A point in favor of A is that the troubleshooting instructions don't make much sense in the context of upgrading, especially the advice to try installing again on the same USB stick and try installing on a different USB stick. If we do something else than A, we should tackle this elsewhere.