@jimmy regarding mining on an old iMac, you might want to check the discussions in the mining section. The process is evolving fairly rapidly and I think that GPUs are going to be your main competitors, but I’m not an expert. Better to ask @tromp
- If you want to mine Grin but don’t have a GPU there are various pools and cloud options that are emerging. There’s a list of them somewhere in the Docs, but I don’t remember where. Hopefully they’ll be more organized before the main net launch though.
- If you’re set on using your old iMac, there’s sites like WhatToMine - Crypto coins mining profit calculator compared to Ethereum that can help you choose a blockchain that’s friendly towards CPUs and has a low hash power that you could contribute to
