SSLStrip Not Working Against Macbook

Hello again, guys! I am trying to use sslstrip between two of my machines, but I am coming up with something strange;

I have run SSLStrip successfully against a virtual machine of mine, but am having an issue when trying to strip my macbook. I think it is worth noting that the virtual machine was running on the same PC that was stripping it ('wired' connectioin).

The macbook I am using however, is connected via WIFI. I think that is worth noting, but I am not sure if that is a big problem. In case it was a problem, I went ahead and plugged my wifi dongle in and tried to do this attack through wifi. I was not able to complete my testing because for some reason I would get "could not ARP host: XXX.XXX.X.XX" when trying to use wlan0 as my spoofing interface.

1. Should I be doing SSLStrip through wifi since my laptop is connected via wifi?
2. What is the reasoning behind Arpspoof not working for me when trying to use my external WI-FI dongle?

Thanks in advance!

P.S.

I would also like to note that I tried using Safari and Chrome on the Macbook just to make sure Safari wasn't stopping me. Both browsers go straight to HTTPS.

ex. facebook.com goes right to https://www.facebook.com