Hi @zhudson22 ,
1. Before you connect the MIMXRT1170-EVK board to the MCUBootUtility, you need to set the MIMXRT1170-EVK board:
SW1:1-OFF 2-OFF 3-OFF 4-ON
Enter serial downloader mode.
Find two USB cable, one connect to J11, one connect to J20. J38 5-6 connect.
2. In the MCUbootUtility,

Code use this one:
NXP-MCUBootUtility-3.3.0\apps\NXP_MIMXRT1170-EVK_Rev.A\cm7\led_blinky_0x3000a000.srec

Then download the code, after downloading finished, SW1: 1-OFF,2-OFF 3-ON, 4-OFF.
Press reset, you will find the LED is blinking.
Please try it again on your side.
I have tested it, it's working.
Best Regards,
Kerry