I am stuck in the OS X Installer screen. I have tried restarting, and shutting down.

I can't reinstall Sierra, because I am unable to quit the OS X Installer screen.

II didn't erase the disk - I just recovered a file using the Time Machine function. When the program didn't work properly, I tried to install an earlier version of OS X, but it wouldn't install, and I'm stuck in the Installer screen.

Thanks for the quick reply.

Whole going through the OS. Install screen, I come to a prompt that asks me which drive I want to install the OS to. I choose the "Macintosh HD" drive, and I receive the following message: "This operation could not be completed. (com.apple.oinstall error -1.)" At this point, I can go no further, and going back doesn't offer any options that would allow me to quit the OS Install screen.

I hope this might help.

I just tried that, and wasn't able to access the recovery partition. I received the note, "Starting Internet Recovery." I was asked to choose and sign into my router, then was back into the OS Installer. Since that seemed to be a dead end, I restarted from there, and now I seem to be in a loop where the computer tries several times to reboot, then shuts down. It displays the message, "Your computer restarted because of a problem. Press a key or wait a few seconds to continue starting up." I then get the Apple logo, and some progress on the log in bar, and then it displays the message again. Now a new thing, it displayed a circle with a diagonal bar through it. I tried booting into the recovery partition again, and now I'm back into the OS Installer. I thought I would try to recover an earlier version of my system from Time Machine, so I connected my external hard drive and started the computer - - - and it worked as soon as I turned it on!!! The computer booted right into the normal log on screen, and everything seems to be in the correct places and working properly. I'm not sure what we did, but I am back up and running, and extremely happy!!

Thanks to everyone for their help!!

The MBP is early 2015, and I was trying to install OS 10.1 if I remember correctly.