UC Berkeley says that all SAT and/or ACT scores needs to be sent to them. But can I just send all my SAT scores but no ACT scores?
you wrote yourself in the post “and/or…” so that means you can choose which test. I’m pretty sure that means sending all of your SAT scores, and not having to send ACT in addition.
For Berkeley, yes. But other colleges may have different rules.
I think they mean that if you choose to submit SAT scores, they want to see the scores from all of the SAT tests you took. Submit SAT or ACT, whichever paints you in the most positive light.