This is easiest in a home environment where you can just unplug the router, let it sit for a minute or so, then plug it back in again. It’s often a good idea to reboot the wi-fi router the Mac is connecting to as well, which can resolve some simpler wi-fi router issues that sometimes pop up with certain router brands and Macs. If that’s the case, be satisfied with the relatively easy troubleshooting process and you don’t need to proceed any further. When the Mac boots back up and wi-fi is enabled again, for many users their wireless internet connection will immediately work again as expected. When the Mac has booted back up as usual, go back to the Wi-Fi menu and choose “Turn Wi-Fi On” and join your typical wireless network.After those matching wi-fi configuration files are out of the SystemConfiguration folder, reboot the Mac by going to the Apple menu and choosing “Restart”.Remove those matching files, you can either place them into a folder on the desktop as a rudimentary backup, place them into the Trash without emptying, or actually delete them.Locate and select the following files in the SystemConfiguration folderĬom.plist. Library/Preferences/SystemConfiguration/ Enter the following path exactly into “Go to folder” window and choose “Go”.Open Finder in macOS and pull down the “Go” menu and choose “Go To Folder” (or hit Command+Shift+G to get there quickly).Turn OFF wi-fi by selecting the wi-fi menu bar item and choosing “Turn Wi-Fi Off”.Quit any active applications that are using wi-fi or the internet (Safari, Chrome, etc).Do not remove any other system configuration files. This is going to involve removing some system configuration files, therefore you should backup your Mac first, just in case. 1: Remove Existing Wi-Fi Preferences in macOS Sierra Time Machine makes it easy, but you can use whatever backup method you’d like. It is recommended to backup your Mac before beginning any of this process. We’ll also cover some additional generic wi-fi troubleshooting tips that may be helpful if the primary two approaches do not resolve the difficulty. The approach may fix other networking related issues as well, but those are the primary wifi problems aimed to be addressed by this walkthrough.
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