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fisherking

macrumors G4
Original poster
Jul 16, 2010
11,262
5,574
ny somewhere
am having a good experience with my 2019 21" imac, but... need more usb ports! can i plug 2 usb 3 (A) drives into the thunderbolt ports? (with an adapter)? and will they get power, and... work?

seems simple, but wanted to ask here...
 
am having a good experience with my 2019 21" imac, but... need more usb ports! can i plug 2 usb 3 (A) drives into the thunderbolt ports? (with an adapter)? and will they get power, and... work?

seems simple, but wanted to ask here...

I used a powered Belkin hub with powered desktop drives before I returned my 2019 27 in base iMac.

It works but the Mac USB implementation seems flaky - the drives will just unmount themselves from Finder but still appear in Disk Utility and I wasn't able to eject them using Disk Utility or the diskutil command in Terminal. These were USB 2.0 drives though.

The USB 3.0 drives I plugged straight into the iMac would also do the same.

It would be interesting to see if they work better into the USB-C / Thunderbolt ports
 
I used a powered Belkin hub with powered desktop drives before I returned my 2019 27 in base iMac.

It works but the Mac USB implementation seems flaky - the drives will just unmount themselves from Finder but still appear in Disk Utility and I wasn't able to eject them using Disk Utility or the diskutil command in Terminal. These were USB 2.0 drives though.

The USB 3.0 drives I plugged straight into the iMac would also do the same.

It would be interesting to see if they work better into the USB-C / Thunderbolt ports

i actually had a small usb A to C adapter (to use with my macbook); i plugged one of my usb A drive into it, into the thunderbolt port... and worked perfectly. just ordered 2 more adapters, and am pretty sure i'm in business!
 
Why didn't you just get a USB hub?

i've got 2 hubs; am running about 7 usb peripherals (plus an occasional flashdrive or additional external). it's all hubs! i wanted to... simplify, and seemed logical to want to use those 2 thunderbolt ports.
 
i actually had a small usb A to C adapter (to use with my macbook); i plugged one of my usb A drive into it, into the thunderbolt port... and worked perfectly. just ordered 2 more adapters, and am pretty sure i'm in business!

Can you include a link to the ones you ordered which work fine? Is the fit usually pretty easy and smooth?

I ordered the really cheap ones from Aliexpress and they can't fit into my MacBook's USB C port. I have to push really hard and the connection isn't flush. I am afraid if I push any harder I may damage the connector on the MacBook's port end which isn't worth it for a cheap adapter. The external drives don't show up so I presume the connection wasn't made.

Thanks
 
I used a powered Belkin hub with powered desktop drives before I returned my 2019 27 in base iMac.

It works but the Mac USB implementation seems flaky - the drives will just unmount themselves from Finder but still appear in Disk Utility and I wasn't able to eject them using Disk Utility or the diskutil command in Terminal. These were USB 2.0 drives though.

The USB 3.0 drives I plugged straight into the iMac would also do the same.

It would be interesting to see if they work better into the USB-C / Thunderbolt ports


Maybe I'm misunderstanding you, but all disks—mounted and unmounted—are supposed to appear in Disk Utility. How else are you supposed to mount them again without replugging them?
 
Maybe I'm misunderstanding you, but all disks—mounted and unmounted—are supposed to appear in Disk Utility. How else are you supposed to mount them again without replugging them?

Exactly what I said: the drives will just unmount themselves from Finder but still appear in Disk Utility and I wasn't able to eject them using Disk Utility or the diskutil command in Terminal. These were USB 2.0 drives though.
 
How else are you supposed to mount them again without replugging them?
Mountain is a tool that allows you remount USB drives via menu: https://appgineers.de/mountain/
i've got 2 hubs; am running about 7 usb peripherals (plus an occasional flashdrive or additional external). it's all hubs! i wanted to... simplify, and seemed logical to want to use those 2 thunderbolt ports.
I went for Caldigit TS3 Plus, has plenty of ports, TB3 downstream port and even UHCII SD card slot.
 
It's really strange - I brought the cheap Aliexpress adaptor to the Apple shop.

It works on the current MacBook Air but NOT on my older MacBook Pro or the current iMac, where in both cases it doesn't fit. On the MacBook Air it slides easily in and then clicks.

I thought all USB C connections were pretty standard
 
OP wrote:
"can i plug 2 usb 3 (A) drives into the thunderbolt ports?"

Those ARE NOT "thunderbolt" ports.
They ARE "USBc" ports (that can use thunderbolt devices with the proper connecting cable).

If you have a device with a USBa type connector, get one (or two) of these adapter/dongles:
https://www.amazon.com/Cable-Matter...=gateway&sprefix=usbc+to+usba,aps,137&sr=8-21
Work great on my 2018 Mini.

Or, get a USB3 hub with a USBc-to-USBa cable.
Or, you could even get a thunderbolt dock that has USB3 ports, but they would be expensive overkill.
 
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