Can Focusrite 4i4 power requirement of 900mA run on Macbook Pro 2012?

Discussion in 'Recording Studio' started by sazista, Aug 18, 2020.

  1. sazista

    sazista Active Member

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    Last edited: Aug 19, 2020
  2. tolm

    tolm Well-Known Member

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    Which MacBook? The new ones with Thunderbolt 3 / USB-C are themselves powered via a USB connection ... Apple quote 100W in and up to 15W supplied to “downstream” bus-powered devices. At the standard 5V USB voltage that’d be 3A which I would expect to be more than enough!!

    https://www.apple.com/uk/thunderbolt/
     
  3. sazista

    sazista Active Member

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    ah, mid-2012 with High Sierra, Logic Pro X
     
  4. tolm

    tolm Well-Known Member

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    One of these?
    https://support.apple.com/kb/sp649?locale=en_GB

    It has an older style Thunderbolt port (as well as USB 3) but even that has a maximum of 550mA so you might be outta luck.

    Might be able to find a powered USB hub that will work? But some devices are funny about hubs so not 100% sure on that.
     
  5. tolm

    tolm Well-Known Member

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    Hmmm ... check the USB Specifications section on this Apple support page:

    https://support.apple.com/en-gb/HT201163

    If your MacBook is the same spec as the one I linked in my previous post, it has USB 3 at up to 5Gbps - which is USB 3.1 Gen 1 according to this link and DOES support up to 900mA.
     
  6. papagayo

    papagayo Well-Known Member

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    The bad case possible is higher charge time.
     

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