To fix the EFI System Partition for Multi-booting, you will need to boot via USB or make changes to GRUB since GRUB will not boot macOS.
Demonstration of Triple Boot
Configuring the Triple Boot
Post Installation
To fix the EFI System Partition for Multi-booting, you will need to boot via USB or make changes to GRUB since GRUB will not boot macOS.
Demonstration of Triple Boot
Configuring the Triple Boot
Post Installation