MacBook install issues

So you are at the mercy of AppleCare. Only their disc will work.

If they are out, get another Mac, that has 10.7 through 10.12 on it, and we can get look at migrating the data over:

https://support.apple.com/en-us/HT1661

Try this browser & link...

https://brave.com/

https://itunes.apple.com/app/macos-high-sierra/id1246284741?mt=12

How to create a bootable installer for macOS

You can use an external drive or secondary volume as a startup disk from which to install the Mac operating system...

https://support.apple.com/en-us/HT201372

2010 MacBook Pro does not support internet recovery without a firmware installation first.

March 15, 2010 and later you must get the original MacBook Pro 10.6 installer disc to install Mac OS X on it, if you don't have a 10.7 or later bootable external hard disk to use on it.

Note, early 2010 MacBook Pro can only run up to El Capitan. You need a mid-2010 or later MacBook Pro to run Sierra.

Use a magnifying glass (or the zoom on your phone) on the bottom of the case to find the serial number, write it down, and look it up here:https://checkcoverage.apple.com

that will tell you exactly which model you have.

If it is a March 15, 2010 or later model, call AppleCare and request the original discs.

If they don't have it, you'll need another Mac with a copy of the later operating system that will work with it. Then you can use Carbon Copy Cloner over Target Disk Mode to copy it onto the computer (mind you, you need the necessary license to be transferred to that machine, and change your operating system on the source machine when you are done).

If it is older than March 15, 2010, locate a copy of Snow Leopard retail 10.6.3 online. The disc must look like this:

And not say Upgrade, Update, OEM, or Dropin on it.

There are no USB installers for the MacBook Pros. There was one for the MacBook Air, but that is specific to the Air.

If you want to use DIskMaker on another Mac to create a 10.7 through 10.12 installer on a USB stick you can, or if you have enough room, just simply install the operating system and copy of Carbon Copy Cloner on the USB stick, and make the clone booted off the USB stick. Option key allows you to boot external drives on a Mac as long as they are compatible.

You can for that matter put the other Mac in target mode, and run the cloning software after booted off the other Mac.

But regardless, 10.6 is only available on disc, and only once you have installed 10.7 or later do you get the choice of internet recovery. Run the firmware for it, and you’ll have it in the future.

Correct, the one that your system will work with. The key is knowing the age of the computer vs March 15, 2010.