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Can I connect Display to Mac with Thunderbolt Cable while using a different power cable?

Hello, It looks like the Octopus that comes with the display has some issues during connection.

Can I connect the display to a mac with a new Thunderbolt cable and have the power coming form a different cable than the original? Thank you for your reply



[Re-Titled by Moderator]


Posted on Oct 16, 2024 2:59 AM

Reply
8 replies

Oct 17, 2024 2:04 PM in response to DrDenis

My major concern is about the function of the Thunderbolt connection in

the back of the display. Does it work as a HUB or it works as an IN

connection?

Yes, even you connect with the other TB port, the hub will still function (USB 2.0, Firewire 800 and Ethernet connections).


Do you think the power of the Mac is enough for the monitor also?

You have to buy an adapter for MagSafe 1 to USB-C -- which I am not a fan of due to 3rd party manufacturer's quality. I will highly recommend to use 14" MBP's power supply for the purpose.


Option 2: You can get a good Thunderbolt Hub (such as OWC or Caldigit ...etc.) - it can deliver the power and data for the MBP, with extra connections (such as USB 3, card reader ...etc.) - all by 1 single TB wire connection.


BTW, no matter your choice would be - you still need to get a TB 3 to TB 2 adapter to connect TB display to MBP or TB Hub.

Oct 17, 2024 6:30 AM in response to DrDenis

Yes (in short).. from my experience, this should work (or a quick diagnostic method to rule out the Octopus cable issue). And this should not cost much (make sure using TB 2 cable). If you want to connect to Mac Mini (desktop devices), you can omit the Octopus' power cable part. The desktop devices would use their power sources.


If you use laptop devices and use it as "clam shell mode" - you can just use the laptop's own power cord for that.

Oct 17, 2024 6:43 AM in response to samtenor

Hi, thank you very much for your prompt reply.

My plan is to used it connected to a macbook pro 14" closed. Do you think the power of the Mac is enough for the monitor also?


My major concern is about the function of the Thunderbolt connection in the back of the display. Does it work as a HUB or it works as an IN connection?

Thank you

Oct 26, 2024 9:02 PM in response to DrDenis

DrDenis wrote:

Do you think the power of the Mac is enough for the monitor also?


The Thunderbolt Display must be plugged into an AC power outlet. It is not a bus-powered accessory like a USB flash drive or portable HDD/SSD.


The MagSafe head of the "hydra" cable is for supplying power FROM the Thunderbolt Display to a Mac notebook. However, since we are talking about an old version of MagSafe, it is easiest to leave this head disconnected.


My major concern is about the function of the Thunderbolt connection in the back of the display. Does it work as a HUB or it works as an IN connection?


It's meant to be a daisy-chaining port, but in other threads, people have said that if the "hydra" cable is bad, you can run a Thunderbolt 1/2 cable into this port to bypass the bad "hydra" cable.

Can I connect Display to Mac with Thunderbolt Cable while using a different power cable?

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