a lot of developments though have occurred since i last did those, and one is that it doesn't show up anymore on the bootable drives list when pressing option upon startup. i have tried numerous methods but they have not worked at all. i think this first showed up after i wiped out windows without using bootcamp. i have a problem regarding this lingering efi partition in my mac which is hindering me from installing windows through bootcamp. I have a macbook pro mid 2012 13", running on macos x el capitan. ![]() I am using a 13" 2015 MacBook Pro with Retina display on macOS High Sierra 10.13.6 Running " mkdir /Volumes/efi" and then " sudo mount -t msdos /dev/disk0s1 /Volumes/efi" both as root now allows me to mount the EFI partition normally via "diskutil mount disk0s1", but does not fix BootChamp.įYI holding option at boot does allow me to go to windows. I have not tried First Aid in disk utility or re-installing the BootChamp app yet. Running "/sbin/fsck -fy" from single-user mode Running the command " sudo /usr/sbin/bless -mount /Volumes/BOOTCAMP/ -setBoot -nextonly -verbose" as a suggestion from this link: output from terminal I get is this: Disabling system integrity protection via recovery mode terminal after resetting SMC/NVRAM (SIP was also off before resetting those 2) Resetting SMC via shut down, and then holding control+option+shift+power button for 10 seconds, and then booting up ![]() Resetting PRAM and NVRAM via command+option+p+r after boot chime I need the ability to use BootChamp back. After further investigation, I also found I was unable to mount the EFI partition via "diskutil mount disk0s1". After the new macOS 10.13.6 update, my ability to use BootChamp to quickly switch to Windows 10 from macOS via one-time next only boot is gone.
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