Would a miner have to update their mining software, such as ethminer, to go on a forked version of the chain? Or is it up to the pool to decide which chain to mine?
Also, if a miner is mining on a pool that chose to stay on the regular chain, is moving to a forking pool the only way to participate in the forked version?
A pool miner would not have to update their mining software (ethminer or equivalent) to go to the forked version of the chain.
It is up to the pool, running the Ethereum node software (geth, parity or equivalent) to update that software to go to the forked version of the chain.
Moving pools is the only way to participate in the forked version if you are a pool miner and your current pool does not move to the forked version of the Ethereum node software.
