How to remove data clearly on rMBP?

[peterpan123]

Hi, I am returning the work computer to a company. I don't want them to access the files. What is the best way to rip the SSD on my rMBP? I recall somebody mentioning about zero in. How many times do I have to do it?

 

[cjducasse]

Hi, I am returning the work computer to a company. I don't want them to access the files. What is the best way to rip the SSD on my rMBP? I recall somebody mentioning about zero in. How many times do I have to do it?

https://support.apple.com/en-us/HT204904

You'll only be able to do this if they haven't set a firmware password.