Incompatible Upgrade

Morgan Townie wrote:

I have an older MacBook Pro (about 2007). I mistakenly tried to upgrade it to a version later than 10.13.6 (10.13.8 I think) and now it is completely unresponsive. How can I get it open to the point I can install the 10.13.6 OS?

How to reinstall macOS from macOS Recovery - https://support.apple.com/en-us/HT204904

You are limited by hardware to the following macOS 10.11.6

OS X 10.11 El Capitan - Technical Specifications:

https://support.apple.com/kb/SP728

How to upgrade to OS X El Capitan - Apple Support

https://support.apple.com/en-us/HT206886

download direct:

http://updates-http.cdn-apple.com/2019/cert/061-41424-20191024-218af9ec-cf50-4516-9011-228c78eda3d2/InstallMacOSX.dmg

MacBook (Early 2015)

MacBook (Late 2008 Aluminum, or Early 2009 or newer)

MacBook Pro (Mid/Late 2007 or newer)

MacBook Air (Late 2008 or newer)

Mac mini (Early 2009 or newer)

iMac (Mid 2007 or newer)

Mac Pro (Early 2008 or newer)

Xserve (Early 2009)

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compared to :

If you can run macOS 10.12 Sierra, you can run macOS 10.13 High Sierra

https://itunes.apple.com/us/app/macos-sierra/id1127487414?ls=1&mt=12

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macOS 10.13 High Sierra - Technical Specifications:

https://support.apple.com/kb/SP765?locale=en_US

https://itunes.apple.com/us/app/macos-high-sierra/id1246284741?ls=1&mt=12

How to upgrade to macOS High Sierra

https://support.apple.com/en-us/HT208969

MacBook (Late 2009 or newer)

MacBook Pro (Mid 2010 or newer)

MacBook Air (Late 2010 or newer)

Mac mini (Mid 2010 or newer)

iMac (Late 2009 or newer)

Mac Pro (Mid 2010 or newer)

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Morgan Townie wrote:

Forget my latest post. Two or three restarts got things squared away. Thanks for your help.

Good computing Morgan Townie— glad this was helpful information, post back if you have any further issue.