I have recently upgraded my mid 2013 MBP with High Sierra and now my Linux partition that I previously installed via Boot Camp is not available as an OS option when booting while holding the Option key.
Previously it showed as "Windows" (although its Kali). Now it does not show at all.
When inspecting with Disk Utility, I see both partitions along with the OSX partition, but the Linux ones show as "Disabled".
What do I need to do in order to get the boot loader to recognize the Linux OS on startup? Thanks.