I just downloaded the new OS and now have a flashing folder with a ?
What OS version did you download? Did you run the installer after downloading? Did the install start and appear to complete? Can you boot into the Recovery Partition (command - R on a restart) and reinstall the OS?
What did you just download?
What Apple device did you download it on?
Mountain Lion is certainly not a new OS which is the forum you have posted in.
You are going to have to provide more detail if you wish to get any help.
A MacBook Air A1465. I was prompted to download the new OS today and proceeded. On the restart I got a blinking folder with a question mark.
Did you backup before starting the upgrade?
I did not backup the PC. Fortunately I don’t keep any files on the MacBook.
I am not sure how to tell what oS I installed. I am trying the reinstall suggestion. It shows masOS High Sierra.
I just downloaded the new OS and now have a flashing folder with a ?
