Client: Hi, I need some help with my Mac.
Every time I turn it on, it shows a question mark.
Me: That sounds like your computer doesn’t recognize a boot drive on your device. How long ago did this happen?
Client: Oh, I just bought this computer from my friend. Great deal! Less than $500. She also bought me a new hard drive for me. So nice of her!
Me: Ok, so when she installed the new drive, did she restore the data from the previous drive to the new one?
Client: I don’t know why she would do that. Also, I put in the drive myself. It should work!
Me: So you put in a new hard drive, and expected it to just work?
Client: But it’s a Mac! It should just work, right?