tbt-flash.sh enables flashing external GFX enclosures for the first time on macOS via EFI. To flash firmware, your system will restart. The script will provide directions as you execute it.
Start with the wiki.
EFI flashing and utility patching was a combined effort, with due credit to @asotoshpalai. This project would not have been possible without him.
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Thank you for using tbt-flash.sh.