Windows 10 on external SSD: rename "EFI Boot" in startup manager?


macrumors 601
Original poster
Jul 30, 2007
Tokyo, Japan
I've googled this and found other people asking the same question, but haven't found any answers yet.

I installed Windows 10 on an external SSD and it works great. The only weird thing is that when I hold Option while booting, I'm given the choice of booting to Catalina on my internal drive, or "EFI Boot" for Windows (on the external SSD). I can't seem to find where this name is actually stored, or how to change it. If I change my startup disk from within System Preferences, it correctly shows as the Windows 10 partition's name, the highly creative "Windows" ... lol. But when I reboot the iMac and hold the option key to select, it shows the Windows install as "EFI Boot."

Does anyone know how to change it?
  • Like
Reactions: dimme