I recently had some issues where a bridged virtual machine in osx would disconnect my osx side network connection. A simple release and renew would fix this.
Simply open up Terminal in OSX and type:
sudo ifconfig en0 down
sudo ifconfig en0 up
Obviously if you are renewing another interface other than your Ethernet port, en0 would need to be changed to the corresponding short name of the interface.
I live stream on Twitch and encourage you to drop in and ask a question. I regularly publish on YouTube and christitus.com, but if you need immediate assistance, check out our discord channel at Chris Titus Tech Discord.