Mac runs slowly after macOS High Sierra upgrade. After install sierra mac stopped waking up for network access password. It says it is connected to WiFi router but Safari pages loads are stuck at 1 inch of blue progress bar. Upgraded from macOS Sierra 10.12.6 to High Sierra 10.13.4 on MacBook Pro, and then internet is no longer working. Internet not working after macOS High Sierra upgrade. MacOS Sierra Slow: How to speed up slow macOS Sierra If you have upgraded and you don’t see any particular problem, but rather a general sluggishness in the system, maybe you need to try some system tweaking to fix slow Sierra issues. If your Mac isn't compatible with macOS Sierra, the installer will let you know. To find your Mac model, memory, storage space, and macOS version, choose About This Mac from the Apple menu. Mac mini introduced in mid 2010 or later iMac introduced in late 2009 or later Mac Pro introduced in mid 2010 or later. If you've followed the steps to connect your Mac to a Wi-Fi network, but the connection to your network or the Internet isn't reliable, the steps in this article might help. If your Mac is set up to connect to a Wi-Fi network, it can analyze the connection for issues that affect its performance, including its connection to the Internet.

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