Hi, of course the advise is correct to download the Debian installation image and to put it plainly onto a USB stick (or to burn it onto a DVD).
But: LuKaRo wrote: > Mac OS is not able to open it, as it does not really support other > file systems than the Apple ones. That's a bit hard to believe. ISO 9660 is a widely supported exchange format. (Your mileage may vary with files >= GiB, though.) https://osxdaily.com/2008/04/22/easily-mount-an-iso-in-mac-os-x/ https://www.top-password.com/blog/open-and-mount-iso-file-on-mac-os-x/ I further wonder about the "dmg" in the title of this thread. How much is this old wiki page relevant ? https://wiki.debian.org/InstallingDebianOn/Apple/MacBookAir/3-2 It prescribes to use MacOS tool hdiutil to convert the .iso to a different type of image which then gets copied onto the USB stick. This seems to stem from an Ubuntu page of 2013: https://help.ubuntu.com/community/How%20to%20install%20Ubuntu%20on%20MacBook%20using%20USB%20Stick absurdlapse wrote originally: > ... > I am on a 2020 iMac running macOS Catalina Has such a conversion been applied to the downloaded ISO ? I would expect that the EFI equipment of an unconverted Debian ISO boots from an USB stick on such a machine. Have a nice day :) Thomas