my Core does not accept a new private key:
$sudo dfu-util -d 1d50:607f -a 1 -s 0x00002000 -v -D core_private.der
Copyright 2005-2008 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2012 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to email@example.com
Filter on vendor = 0x1d50 product = 0x607f
Opening DFU capable USB device… ID 1d50:607f
Run-time device DFU version 011a
Found DFU: [1d50:607f] devnum=0, cfg=1, intf=0, alt=1, name="@SPI Flash : SST25x/0x00000000/512*04Kg"
Claiming USB DFU Interface…
Setting Alternate Setting #1 …
Determining device status: state = dfuERROR, status = 10
dfuERROR, clearing status
Determining device status: state = dfuIDLE, status = 0
DFU mode device DFU version 011a
Device returned transfer size 1024
No valid DFU suffix signature
Warning: File has no DFU suffix
DfuSe interface name: "SPI Flash : SST25x"
Memory segment at 0x00000000 512 x 4096 = 2097152 (rew)
Downloading to address = 0x00002000, size = 610
Poll timeout 50 ms
Error during second get_status
state(10) = dfuERROR, status(14) = Something went wrong, but the device does not know what it was
I am running Mac OS X and I have a Spark with an chip antenna. After booting the Core flashes cyan and red in a mixing mode. I hope you can help me.