Neotrellis + Audio Board I2C Lock Up

Looks like Adafruit shipped my older on Wednesday (it was placed on their website over the weekend) and the tracking info says it's due to arrive early next week.

Please understand if the lockup problem does turn out to be a bug in any of the code we publish for Teensy, whatever fix is made will only be tested and published in a new version. Support for MacOS 10.13 (High Sierra) is not coming back. I know it's unpleasant, but we just can't maintain support for extremely old versions of MacOS.
If you need to patch an older WireIMXRT.cpp in an older version, this link should take you to the lines to add in. Can't guarantee it'll work with a very old version, mind you! Or even fix the issue...