Resetting your Mac System Management Controller (SMC) can be a solution. This is sometimes necessary to restore normal lower level system functionality to your Mac, particularly for power and hardware related troubles.
- Follower the SMC reset with an NVRAM or PRAM on your Mac ( see bottom of the page. )
How to reset the SMC on Mac notebooks
If you have a MacBook Pro (2018), skip ahead to the section that deals with your Mac.
To reset the SMC on a Mac notebook,
- Choose Apple menu > Shut Down.
- After your Mac shuts down, press Shift-Control-Option on the left side of the built-in keyboard, then press the power button at the same time. Hold these keys and the power button for 10 seconds. If you have a MacBook Pro with Touch ID, the Touch ID button is also the power button.
- Release all keys.
- Press the power button again to turn on your Mac.
Reset NVRAM or PRAM on your Mac
If your Mac has issues related to settings stored in NVRAM or PRAM, resetting it might help.
NVRAM (nonvolatile random-access memory) is a small amount of memory that your Mac uses to store certain settings and access them quickly. PRAM (Parameter RAM) stores similar information, and the steps for resetting NVRAM and PRAM are the same.
Settings that can be stored in NVRAM include sound volume, display resolution, startup-disk selection, time zone, and recent kernel panic information. The settings stored in NVRAM depend on your Mac and the devices that you're using with your Mac.
If you experience issues related to these settings or others, resetting NVRAM might help. For example, if your Mac starts up from a disk other than the one selected in Startup Disk preferences, or a question mark icon briefly appears before your Mac starts up, you might need to reset NVRAM.
How to reset NVRAM
Shut down your Mac, then turn it on and immediately press and hold these four keys together: Option, Command, P, and R. You can release the keys after about 20 seconds, during which your Mac might appear to restart.
- On Mac computers that play a startup sound, you can release the keys after the second startup sound.
- On Mac computers that have the Apple T2 Security Chip, you can release the keys after the Apple logo appears and disappears for the second time.
Comments
4 comments
I am experiencing a connection issue with hyper-drive, duo hub for USB-C MacBook Pro number 19360028A01. I'm using a MacBook Pro 2019 with Catalina OS. Finder keeps notifying me that the disc is not ejected properly. I am using a SD card to transfer images. While I try to Read, Write or look at the images I keep getting a notification on my MacBook. I have attached a screenshot of that notification.
also my Duo hub (HD28C) is not working, i have a macbook pro m1. it has been working fine for a long time but since a few days my hub LED won't turn on, and i can not use any extern ssd's or other cabels, charging works but thats it. These hubs cost alot of money (80-90 euro's here in the netherlands) for that kind of money i don't expect any problems!
I have to keep doing this to keep the drive working. Or I have to remove for a few days and let it cool down to get things to work. I thought this drive would be awesome but have not been very happy with this drive. If there was a permanent fix I would love it.
Thanks
Brian E.
Since the update to Big Sur 11.2.1 the only port working on my Duo 7-in-2 (HD28C) is the power port, regardless of how many times these resets are done.
Apple says the third party device manufacturer needs to update the firmware or drivers for the hub's function to be restored. Without that update I'll need to spend hundreds of dollars to restore the set up that the Duo affords me. I'd really rather not spend the money, but may not have a choice. Please help.
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