Looks like getting into the kickstart for password recovery has changed a bit with NXOS 7.x. NXOS 7.x features a consolidated binary image rather than the previous pair of kickstart and system images we are used to seeing on Nexus 3000.
It's not exactly obvious how one boots to the kickstart. So here's the new sequence:
Step 1 - Power Cycle and Interrupt to the Loader with CTRL-L
When you see this:
Press ctrl L to go to loader prompt in 2 secs
Step 2 - Set recoverymode=1 and boot your NXOS 7.x image to get the Kickstart
First, ensure you can find your NXOS 7.x binary image using
loader> dir ... bootflash: nxos.7.0.3.I2.2a.bin
Then force boot to kickstart and boot the image.
loader> cmdline recoverymode=1 loader> boot bootflash:nxos.7.0.3.I2.2a.bin Booting kickstart image: bootflash:nxos.7.0.3.I2.2a.bin Image valid INIT: version 2.88 booting Skipping ata_piix for n3k. ...
This should land you at the
switch(boot)# prompt and you can follow usual procedures from there.