I have a Macbook Air and I think Bytecoin is a nice alternative.
It nets a couple cents every day at least.
So is bytecoin a type of altcoin?
Yes Bytecoin is a type of altcoin, you can check here how much worth a bytecoin on exchange:
https://poloniex.com/exchange#btc_bcn which seems to worth around 7-8 Satoshis