Sometimes, just like applications can act unresponsive and buggy, hardware ports can have similar problems. And just like those applications, a reboot or a reset can fix a problem like a USB port.

Alarm.com app for mac computer. How to add e-mail addresses to contact lists in outlook for mac 2016. Yes, if I plug the Hub on the laptop the ports start working again (the ports of the Hub work too), except for the 3.0 USB port which doesn't work even with the Hub plugged. Why aren't my USB controllers working through my USB hub? Solved External Hard Drive doesn't work on laptop, but it works on a USB HUB solved Will a USB Hub w/Ethernet Port and 3x Extra USB Slots.

The first step in our USB port troubleshooting is the easiest one: a simple reset of the Mac. • Press the icon in top left of screen • Click Restart • Wait for the reboot, and try USB ports again How can this help? Rebooting the Mac resets certain hardware conditions, which may lead to a solution to USB port issues. PRAM, or parameter random-access memory, is a part of the Mac that stores certain settings that can impact hardware performance. • Press the icon in top left of screen • Click Shutdown • Turn on the Mac while holding down the Command-Option-P-R keys until you hear the second start-up sound. • Release the Command-Option-P-R keys. Once the Mac is loaded and running check the USB ports and see if they are working properly.

How can this help? The PRAM is a chip that holds certain configuration settings, including things like the date and time, as well as desktop, volume, mouse, and other control settings.

It’s powered by a small battery, so these settings don’t get lost every time you turn your computer off. Resetting may help with getting USB functionality back. SMC, or the System Management Controller, is a system on a chip within Intel-based Macs that plays a role in controlling several hardware-related operations of Mac computers. It controls many different functions within the laptop, including certain things that affect USB port functionality. Resetting the SMC should only be attempted after Steps 1 and 2. For MacBook's with a removable battery (early 2009 and older) • Press the icon in top left of screen • Click Shutdown • Disconnect the MagSafe power adapter from the computer • Remove the battery • Press and hold the power button for 5 seconds • Release the power button • Reconnect the battery and MagSafe power adapter • Press the power button to turn on the computer For MacBook's with a non-removable battery (mid 2009 and newer) • Press the icon in top left of screen • Click Shutdown • Plug in the MagSafe or USB-C power adapter to a power source and to your computer.

• On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time. • Release all the keys and the power button at the same time. • Press the power button to turn on the Mac laptop.