Hi David:
Unfortuantely MQX 4.x does NOT support K26 devices.
You can port it from a BSP (TWR-K65F180M). The Twr-K65f180M has support for High speed and Full speed.
MQX v5 can suppport K26_180. Please refer to below link for more details.
https://www.nxp.com/design/software/embedded-software/mqx-software-solutions/mqx-v5-software-solutio...
Regards
Daniel