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You may be able to resolve wi-fi dropping after a Mac wakes from sleep by following the steps outlined below to create a new wireless configuration. Some users report that macOS High Sierra drops their wi-fi connection when waking from sleep or when waking from a screen saver, or that macOS High Sierra is slow to re-join wi-fi after waking from sleep.

Does wi-fi only drop when macOS High Sierra wakes from sleep or screensaver wake? This works for many users, but obviously if you must have a hidden SSID for some reason then making the SSID visible is not always a viable option. One possible workaround is to make the SSID visible, this must be done on the wi-fi router itself and will vary per wireless access point, but if you have access to the wi-fi router it may be a solution. You can try disconnecting and then connecting directly to the hidden SSID router in Mac OS, but the connection may drop again or fail upon waking from sleep. Some Mac users with MacOS High Sierra have reported difficulty connecting to wi-fi access points that have a hidden SSID. The bottom line: check for available system software updates and install them if any are available. Point release updates often include bug fixes, and if you’re experiencing a problem that is related to a core system software bug then it’s possible the system software update will resolve that, possibly along with other reported problems Go to the  Apple menu and choose the App Store, then go to the “Updates” section and install any available system software updates to High Sierra.This is easy, but you should always backup a Mac before installing any system software update. If you are still running macOS High Sierra 10.13, then you need to update to the latest point release version available (10.13.1, 10.13.2, etc). Apple regularly releases software updates to system software, and macOS High Sierra is no different. Having Wi-Fi Problems in High Sierra? Update to the latest macOS High Sierra Updateīefore doing anything else, if the Mac is currently on High Sierra then you should update to the latest version of macOS High Sierra that is available. This article will attempt to detail some common problems, and explain some troubleshooting steps to resolve wi-fi issues with macOS High Sierra.