Wouldn't recommend mining on a MacBook as there is not enough heat sink to let the heat. This will not only cause a lot of problems for other components but also reduce its selling price. Check the hash rate you are getting so you can get an estimate the amount of coins you are making and minus the electricity cost ( not in your case) to check profit. You can look into monero. Since you mentioned the MacBook used I would suggest selling the MacBook and holding some coins for a better profit.
Nowadays it's almost all ASICs, non-specialised hardware like CPU and GPU mining, as well as using your laptop, has been basically rendered obsolete because of how high the mining difficulty is.
Electroneum maybe good enough, with that spec you can get around 4 to 8 ETN in 24hours non stop mining. But not really worth i guess, check whattomine.com and try to calculate which coin can give you more profit.
Unless you want to get negative balance for the electricity bill.
