I get a crossed out circle and it shuts off. What can I do?

What is the EXACT model/year of your MBP?

Ciao.

Mac OS X- Gray screen or prohibitory sign appears during startup

Mac OS X- "Broken folder" icon, prohibitory sign, or kernel panic when computer starts

The most likely explanation is that the disc you are using cannot boot the computer.

Restart the computer. Immediately after the chime hold down the COMMAND-OPTION- Rkeys until a globe appears. The Utility Menu will appear in from 15-20 minutes.

1. Select Disk Utility from the Utility Menu and click on Continue button.
2. When Disk Utility loads select the hard drive (out-dented entry) from the side list.
3. Click on the Partition tab in Disk Utility's main window. A panel will drop down.
4. Set the partition scheme to GUID.
5. Set the Format type to Mac OS Extended (Journaled.)
6. Click on the Apply button, then wait for the Done button to activate.
7. Quit Disk Utility and return to the Utility Menu.
8. Select Reinstall OS X and click on the Continue button.

This will install El Capitan or the version of OS X originally installed on your machine when it was new. There are differences between using Disk Utility in El Capitan and using any prior version. But the overall procedure is the same.

If the above also fails to work, then you probably have a bad disk drive.

What was the terminal command you used? What operating system were you running? Because you are getting the prohibitory screen, which means it can find no bootable volume. On a 2012 Macbook Pro, internet recovery would be Command Option R. That would install the operating system that came preinstalled on your computer.

ferndog94 wrote:

Case says 2010 A1286 MD104LL/A

Everymac.com says late 2012

An A1286, MD104ll/A MBP is a 15" 2012 model. What prompts you to say the case says 2010?

What DVD disk were you using to boot the MBP? It it an original installation disk that came with the MBP? If so, it would be more likely be a 2010 model.

If you enter the serial number that is on the back of the MBP here, what does it say regarding the model/year?

https://checkcoverage.apple.com/

It is important to establish what you have before engaging in any extensive trouble shooting.

Ciao.

theratter wrote:

If the above also fails to work, then you probably have a bad disk drive.

No, he probably has a 2010 model (as he indicated).

It matters which year it actually is. A 2012 would have Internet Recovery, a 2010 not so.

Bottom line the OP's Mac can't be a 2010 and a 2012 model at the same time, it matters which it s.

His model number identifies a 2012 model. I checked it to be sure. A 15" MBP 9,1 Mid-2012.

I misspoke. I meant Order Number.

Good, it appears that you do have a 15"2012 MBP.

Have you tried a safe boot?

https://support.apple.com/en-us/HT201262

May not work.

As has been suggested, can you boot the MBP into Internet recovery (OPTION + COMMAND + R)?

It should result in a display such as this:

Ciao.

Addendum: You will need a very solid Internet connection.

Apparently when you ran the terminal commands, you erased everything including the recovery drive. I do not know what osx disk you have as no dvd can have enough install space to have an install of Lion unless you found one that will hold 8gb. That is the minim for a bootable flash drive. If you have access to another Mac, you could download El Capitan from the app store and use a 8 gb flash drive to make an installer to boot from to fix your internal drive. otherwise using Command Option R for internet recovery, you could use the disk utilities tool to fix or erase your drive and install Lion.Then download and install El Capitan.