PLESE help me "purge-wrangler"

Hello everyone
I just got an eGPU,
[XFX RX 5700 XT Thicc III Ultra 8 Go + Razer Core X External Graphics Card Case with Thunderbolt 3 for my MAC BOOK PRO 2013 later.
Just started running normally,One hour later, the system crashed。
I was Uninstalled ```
purge-wrangler

and reinstalled ,But Each time the eGPU is turned on, the MAC system will crash.
Finally i decided
Recovery Process on macOS 10 But encountered a problem again:

For“chmod -R 755 System/Library/Extensions/”
-----------------------------------------------
 chmod: Unable to change file mode on System/Library/Extensions//AppleMIDIBluetoothDriver.plugin/Contents/Resources/hi.lproj/BTLEMIDILocalizable.strings: Operation not permitted.
(How can fix permissions?)


For"kextcache -i /Volumes/Macintosh\ HD"
------------------------------------------------
 You must be running as root to update prelinked kernel.

someone can help me? THANK you