Single-user mode mount USB device failed: AppleKextExcludeList.kext has invalid signature; Trust cache is disabled
Hi expert,
My MBP is broke down, it could not startup normally, I could only login in single user mode.
When i try to mount a USB device to backup data, the mount operation failed, could any expert can help me:
localhost:/ root# mount_msdos /dev/disk2s1 /Volumes/usb
Error in security framework, error -6674.
/System/Library/Extensions/AppleKextExcludeList.kext has invalid signature; Trust cache is disabled.
Untrusted kexts are not allowed.
ERROR: invalid signature for '/System/Library/Extensions/msdosfs.kext', will not load
/System/Library/Extensions/AppleKextExcludeList.kext has invalid signature; Trust cache is disabled.
Untrusted kexts are not allowed.
ERROR: invalid signature for com.apple.kpl.libkern, will not load
Signature failure in dependencies for kext load request.
mount_msdos: /dev/disk2s1 on /Volumes/use: Operation not supported by device
localhost:/ root#
i will going to reinstall the system, but firstly i wish i could backup some data in the disk.
Thanks very much.
MacBook Pro, macOS Sierra (10.12)