Yeah, as I’ve posted elsewhere, mine cracked at about 3 weeks of ownership I guess. Five battery cycles. I’ve been using Apple laptops for 20 years, never had this before. We’ve still got 2013 and 2014 PowerBook Pros around here. (The 2013 just died for other unknown reasons — it goes black after about a minute of runtime — logic board, SSD, something.). The 2019 16” has been used hard and the screen is perfect.
Anyway, I’m pretty sure what happened with mine is that I piicked it up by gripping it near the edge of the screen with it closed. I think my normal method of handling it was too much for the screen; it couldn’t handle the deflection caused by my grip. I’ve never dropped or knocked or dinged this computer in any way, and it never left the house. I consider my treatment and handling of it to be “normal” or even “gentle,” since I’ve never even schlepped it around. I think these M1 laptops need to be handled by the edges and not gripped in any way that squeezes the back of the screen, which can flex and break it. I think the kind of handling I did to break it would be pretty normal handling of a laptop by anyone I know. I think the kind of gentle treatment that is needed is a level of careful I’ve never seen anyone exhibit in my life.
It’s also possible there was a subtle defect in the screen. But I’m sure I didn’t abuse it.
It seems hard to imagine a child or teenager using one of these.
If I quite gently press on the back, on the metal part of my lid now that it only shows black I get an electronic rainbow that shows the deflection of the glass/screen. You can really see the glass deflect, but it may deflect a bit more now that there is a tiny crack. It’s a little psychedelic but not worth breaking your computer to see. I don’t think you can get the glass of an older MacBook Pro to show deflection by pressing gently on the back.
If I compare this to the 2019 or the 2013-14 Macbook Pros here, it seems to me that the top lid of the new one is obviously thinner and easier to deflect. The older ones seem to have thicker metal and a slight arch or subtle dome shape, which I think is probably structurally more rigid. The new one is completely flat, then the edge of the metal, obviously thin, turns 90 degrees from the flat back plane. I’m not an architect or materials engineer but it seems this structure is not as strong. Of course, I would not jump to this conclusion if it hadn’t broken!
I am pretty sure there was no piece of grit or crumb or anything between the glass and the computer when it was closed.
When I get it back from Apple I’m going to put a ridged case at least on the top to prevent deflection from the back. I’ve already ordered one. And I’m going to put a piece of flannel or microfiber under the screen. I used to do this a long time ago with my laptops but I haven’t bothered for many years.
Damn it shook me up when it happened. I feel like I just barely managed to get it all set up the way I wanted and gotten properly moved into it (it was not the most graceful migration I’ve ever had).