It's been a while since I last played, so I tried to go back to it and play it (i'm using Mac) and it won't open. No error sign or anything appears, the icon will do one jump in my tool bar and then nothing happens. I've updated Java, I tried reinstalling Minecraft, I took everything out of the folder and kept my saves on my desktop, and just tried starting the game, but obviously I can't start the game, so that didn't do anything. I'm looking over the native log and it's kind of vague, at the end it says:
Native update needed–We need to update!
I don't know how to update it since it can't open though.
Best Answer
It could mean to update your iMac (such as to El Capitan or High Sierra (which are both free updates by the way)) as it is out of date. Native usually means on your device, so this is probably the way to head. :)