If anyone else has been frustrated by the lack of RT1050 support or is new to NXP products, the MCU On Eclipse blog has been a great help. For example, see the MCUXpresso IDE V10.1.0 with i.MX RT1052 Crossover Processor article for a very clear overview/quickstart on getting the MIMXRT1050-EVK up and running.
Thank you! It is useful!