MacBook bound to email of seller

The MacBook is activation locked due to the seller have not removed it from his account the proper way. The only way you can handle right now is trying to contact the seller. Apple will not remove the lock if you're not the original owner/cannot provide valid proof of purchase information I am afraid, as activation lock is a theft deterrent system

Mac1408 wrote:

Thanks unfortunately I can only contact seller through ebay messages. And seller is not responding. I have however a proof of transaction provided by ebay.

Proof of an eBay transaction with a seller who is not responding is not going to be good enough to convince Apple to remove Activation Lock. If the seller is not responding, that is very suspicious - assuming for sake of argument that the Mac wasn't stolen, why wouldn't the seller want to respond and fix the problem with the sale?

I believe what Apple would require is proof of original purchase from Apple or an authorized reseller, with a receipt clearly showing the serial number of the Mac in question. Or something like that.

Something that you don't have and can't provide. You need to take this up with the seller … or failing that, take it up with eBay and your credit card company. Unless the owner to whom that Mac is locked unlocks the Activation Lock, that Mac will remain a brick.