This morning I have installed macOS 26.4, 15.7.5, 10.12 and 10.15.7 on three different machines.

Now restoring back to 10.8 then 10.10 to test something. Maybe more.

#MARCHintosh

@nivrig

Is there anything I need to bear in mind when creating the USB stick? What capacity do I need? Does Wi-Fi work? Or is it only LAN?

@Amiga_News For Limux or macOS?

I used a 16Gb stick for Mint but I think 8Gb would have been enough. WiFi works with a non-default driver, very old webcams might need a binary blob installed (read the blog!). I don't know about TouchID or TouchBar. But everything else worked fine.

macOS instructions are here: https://support.apple.com/en-us/101578

Create a bootable installer for macOS - Apple Support

You can use a USB flash drive or other secondary volume as a startup disk from which to install the Mac operating system. These steps are primarily for system administrators and other experienced users.

Apple Support