After restarting MacBook Pro Thunderbolt Ports stopped working

Consider downloading and running this little "discovery" utility, Etrecheck. it changes NOTHING.

it contains little tests for speeds of devices, CPU utilization, memory usage, energy usage and a digest of recent problems, in one easy to use package. it does not even need to be Installed.

if you follow the directions faithfully, its report (pre-laundered of all personally-identifiable information) can be "Shared" to the system ClipBoard, then Pasted into an Additional text window in a reply on the forums.

How to use Etrecheck pro for free

http://etrecheck.com



I was going to suggest system report, and checking current available and current required.

 menu >about this Mac > (System Report)

Ref:

Allan Jones made this nice graphic for the community

Some things which may have already been mentioned, but bear repeating.

The system profiler shows the bus break down. Each individual USB-C/Lightning port is also considered part of the USB bus. Each computer contains multiple buses that are separated by port, or sometimes joined between multiple ports on the computer. The slowest device on the bus determines the speed of the whole bus. So if you have a USB-2 keyboard on one USB-C/Lightning port, all devices will only communicate at best at 480 Mbps or 60 MBps.

Energy Saver when it turns on renders the entire USB/Thunderbolt bus in low power mode, requiring supplementary power from either hub with AC/DC adapter, or USB-C pass through on the hub, until you either restart or start up the computer cold. Energy Saver knocks the buses into low power also when you shut the screen lid onto the keyboard. It also has a put hard drives to sleep function which can exacerbate this issue.

Screen Saver has no such side effect.

Thunderbolt cables versus USB-C cables offer more video support, and more overall bandwidth. The connector is labeled with a lightning bolt and otherwise look almost identical, although often thunderbolt cables are built thicker.

The oddity that the thread started with though saying the thunderbolt ports stopped working on restart, makes me wonder if the wrong type of cable is being used to connect the wrong type of device, since a restart should not have the same effect as Energy Saver going on. Unless you are describing a restart, simply waking the computer from sleep. A restart will bring up the Apple logo with a progress bar before you see the desktop.

The battery may have outlived its useful life. http://www.apple.com/batteries helps you learn more about figuring out the age of he battery.

Generally speaking closing the computer in clamshell mode and Energy Saver mode will put the ports in a low powered mode that doesn't go back up until you restart the computer. Get a thunderbolt wall powered hub for any device that needs persistent power.

Did you see that the Hub identified itself as USB-2 and 480 M bit/sec only? Tthat is fast enough for Rotating magnetic drives, but not for SSD drives.

¿is it only devices on this Hub that have the issue?

if so, you have found a flaky or defective component and should discuss this with the Hub manufacturer.

<< i can get a display on my external monitor through every port. >>

then what devices are the ones that do not work in these ports?