Manufacturig isn't perfect, especially when you introduce things like Humans and Fridays. If that doesn't give any love it may actually be a battery problem. Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC. Press the power button to turn on the computer.Release all the keys and the power button at the same time. On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.Note: Portable computers that have a battery you should not remove on your own include MacBook Pro (Early 2009) and later, all models of MacBook Air, and MacBook (Late 2009). Resetting the System Management Controller (SMC) Four weeks ago, I experienced the same at York University, Canada. This is not the first time I see the MacBook Pro not connecting to WiFi while I iPhone or iPad has no problem. On my MacBook Pro, I only occasionally see UnitedWi-Fi in the list of preferred networks. Try resetting it using the following procedure: Starting with the 2016 MacBook Pro, Apple has used a pair of flexible ribbon cables that are pulled tight every time you open the lid on the computer. My iPhone is stably connected to, from which I am typing this. It could just be your system management controller.
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