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Got this from doing a search on the forum. start here.
https://forums.kali.org/showthread.php?25240-Macbook-Pro-Kali-Mac-OS-Dual-Boot-Install-Guide-amp-WiFi-Guide&highlight=install

So i tried to install orca in kali but did not have any luck. I wont say it is impossible but there was a note that it is unstable in kali here is a link http://pkg.kali.org/news/216393.
Perhaps...

hard drive came so kinda a mute point but any thoughts on use of a swap space on usb's for those who run with a persistent usb? I must say I was quite pleased with this ability.

Assuming it wasn't a misspelling as is often my problem

I had several issues until I changed my sources.list from my original install to what is stated on the below page.
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For various non relevant reasons I have not used a unix or linux system for a long time, also there were no usb's at that time.
So now that I have revealed I am an old fart lingering at the edge I...