MP 1,1-5,1 Installing High Sierra on a 2010 is almost impossible

[now i see it]

Bootable USB installers of old Mac operating systems can be purchased on Amazon.
I used one to install El Capitan on my 2010 Mac mini.

USB for macOS Sierra 10.12.6, Full OS Install, Reinstall, Restore, Repair, Recovery and Upgrade Bootable USB Stick Installer Flash Drive for macOS Sierra 10.12.6 USB https://www.amazon.com/dp/B09H5LZXM3/ref=cm_sw_r_cp_api_glt_fabc_S56XFN1WG305C31EZM5K

 

[nintendoswitch]

You can download a iso file for high sierra, and put it on a usb stick/black DVD
though you do need a external disk drive for the DVD option. Hope this helps!

 

[winxmac]

How to download an old macOS installer - Apple Insider website

How to get old versions of macOS - Apple website

How to create a bootable installer for macOS - Apple website

I initially downloaded a Hackintosh distro [macOS 10.14] to install on my Dell laptop then once it worked, I downloaded the Apple installer from the Mac App Store... I was able to download macOS 10.13, 10.14, 10.15 through the app store but for macOS 10.12 and older it is a DMG file... Once I was able to download the installer from the app store, I ran it and used Unibeast to create a Hackintosh USB drive I can use for my laptop... For your case, since you have Apple hardware, you can run the terminal commands to create a bootable USB drive if you want to clean install... I have not tried this since I don't have Apple hardware for macOS...

 

[les24preludes]

Conclusion:

One very simple way to make a new SSD boot disc with High Sierra is something you can do with an existing installation of High Sierra.
- boot your Mac in command/R and select reinstall OS
- enter the disk you want to install the new download to
- the new SSD should be ready formatted for Mac (extended journaled) and given a name
- wait for the download to finish then take out the old HDD and insert the new SSD in its place
- your Mac should then boot up in High Sierra
- reinstall Calendar archive, your old Itunes folder and anything else you need.

I've just done this and now have a new SSD boot drive working. Thanks everyone who helped me.