I am a big fan of MacBooks. This was my fourth one in the past 10 years.  This one was a LEMON. It worked fine at first but began to freeze on booting. Called Apple three times and walked thorough reloading the IOS and erasing the entire system to reinstall. It then went black screen. Took it to the Apple store and was told in two minutes to send it back.  Tried to exchange it for another but apparently you don't have more in stock. Still a fan but sometimes you get a LEMON and are unable to make lemonade.