To answer your question without quotes.

To solve your problem, use

./electroneum-wallet-cli --generate-from-keys WALLET

instead.. it just means the cli isn't installed to your usr/bin folder.. forgot about that..

You also might need to be root.. i can't remember if it is necessary but i just used sudo anyway.. so:

sudo ./electroneum-wallet-cli --generate-from-keys WALLET

not sure what the equivalent of sudo is on mac