

When it ask for installation, select the option named something like "custom partitions" or "something else". You should see the empty part of the drive. When it ask for installation select "Custom: Install Windows only (advanced)" This partition will be used to install Linux.īefore running the installer of Linux, install Windows 10 first to avoid boot problems. Make a ext4 partition wich leave the half of the disk empty for windows 10. If you want a smaller partition make it at least 2GiB in case your RAM would be full.) Make a Linux swap partition of the size of your RAM. Make a fat32 partition of 512MiB with the flag "esp" On the external drive (and make sure it's the right drive and not something else !) reformate the partition table to GPT With the bootable USB start your Linux distribution and start the Gparted software. To install Windows 10 and Linux on a empty external drive (with EFI): It uses rEFInd, but installs it on the external drive so only a few are actually made to my internal SSD.įor anyone seeing this in 2022 or something, I'm happy if this helps! It's perfect for what I want to do.īasically, although it's a bit outdated, it covers all the boot file config stuff. Additional EFI partitions do not have to reside at the beginning of the drive.ĮDIT 2: I think I've finally hit the jackpot here. A drive can have more than one EFI partition. I would really appreciate it if anyone could provide a complete, comprehensive guide to do this in 2019, or at least provide of basic set of steps/links I could follow so the operating systems don't end up screwing each other over.īasically, I mainly want to know about how to do this part: The resources I found online are mostly incomplete or outdated.

Preferably, I don't want to use rEFind or similar, as I don't want to make any (major) changes to my Mac. I plan to triple boot Mac, Windows 10, and Linux (specifically Manjaro EDIT: but Ubuntu's fine) by installing them (Windows and Linux) on an external SSD and booting from there.
