I am selling a MacBook Air tomorrow...it has an SSD....how do I erase it? I read online about how it is different with SSD vs hard drive but I have to admit that it was a little confusing to me. I’m a mom...and my husband is not the techie in the family so I have to figure this out here please. I have done disk utility and erased then Macintosh HD partition. One article I read said to do it encrypted so I did...is that password on there now? I did it again not encrypted.