The slashes seem to be a windows problem, which is a bug in the cc3200tool. By using linux you may fix that.
To set the mac address, you’ll have to create a /sys/macadd.bin with the binary representation of the mac address (just the bytes)
Be sure it correctly connects to the cloud. The box has a servicepack for the wifi chip you may need to install.
Some info about it here: Bricked my box? - #13 by 0xbadbee