Hello, friends ,
I have a question I had a friend that did bitcoin mining for me but when it was done she transferred them back to me as non- spendable. How do I make them spendable?
Your friend didn't transfer you anything. He just gave you his public address so you could watch his bitcoins.
To really receive it you need to create a wallet (like electrum.org) and click receive: you will find a public address, ask him to transfer you to that address