[Elecraft] K3/Mac OSX firmware download seems stuck

[KM5Q]

My K3 (just received) came with a note that said to download the  
latest firmware before using it.
Config menu says uC 1.78 / FW REV 5

I got through most of the process, but it won't finish. Here is the  
report from the K3 Utility:

08:47:53 K3 boot loader is ready for MCU firmware load. RS232 38400 bps.
08:49:08 K3 boot loader is waiting for MCU firmware load.
08:51:18 Connecting to ftp.elecraft.com. Please be patient, this takes  
a few seconds.
08:51:29 Connected to Elecraft server.
08:51:41 Copying files to "Windy HD:Users:windy:Library:Application  
Support:Elecraft:K3 Firmware:"
08:51:53 "hmcu0178.hex" verification succeeded
08:51:58 "TBOOT7.HEX" verification succeeded
08:52:09 "HDSP0158.HEX" verification succeeded
08:52:19 "HAUX0155.HEX" verification succeeded
08:52:36 "DTBL0008.HEX" verification succeeded
08:52:42 Copied "K3UtilityVersionInfo.txt" from Elecraft
08:52:48 Copied "hfwnotes.rtf" from Elecraft
08:52:48 Copied 7 files from Elecraft to "Windy  
HD:Users:windy:Library:Application Support:Elecraft:K3 Firmware:"
08:52:50 K3 boot loader is waiting for MCU firmware load.
08:52:50 Ready
08:54:42 K3 boot loader is waiting for MCU firmware load.
08:59:16 K3 boot loader is ready for MCU firmware load. RS232 38400 bps.


That's as far as it will go after pressing "Send All New Firmware to  
K3".

  I'm using the KUSB adapter between my Mac (with current OSX) and the  
K3. K3 is turned on. I don't see any clues in any instructions about  
anything else I'm supposed to do.

It's Saturday, so the factory isn't open.

?
Windy
K3 S/N 764