Results 1 to 6 of 6
  1. #1
    MacBook Air: USB Port - Powered?
    W6JHB's Avatar
    Member Since
    Jul 07, 2008
    Location
    CA now, WA soon...
    Posts
    4
    Specs:
    iMac - full blown
    Question MacBook Air: USB Port - Powered?
    Does the USB port on the MacBook Air provide 5VDC power? I ask this because long ago, in a distant galaxy, I had a Dell laptop. It did NOT provide power to the USB port - only signal. Thus, any peripheral expecting to be run from the 5V power of the USB port didn't work unless a powered hub was connected to it first. I'm looking at purchasing a piece of equipment that the manufacturer states "no external power supply needed; power is provided by the USB port".

    Anyone know for sure on this?

    Regards, Jim Bennett

  2. #2
    MacBook Air: USB Port - Powered?
    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    45,284
    Specs:
    27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, iPhone 6+, 3 iPods, Yosemite
    All current MacBook portables provide power to their USB ports. However, there is a limit to the amount of power provided. If a USB device is attached that draws power exceeding what the port can safely handle, the port will shut down.

    Regards.

  3. #3
    MacBook Air: USB Port - Powered?
    W6JHB's Avatar
    Member Since
    Jul 07, 2008
    Location
    CA now, WA soon...
    Posts
    4
    Specs:
    iMac - full blown
    Specs - where?
    Thanks for the quick reply! The device I'm looking at will certainly come with tech specs on the amount of current required.

    Know where I can find out the max amperage (or milli-amperage!) that the USB port will be happy with? I looked around the Apple tech specs pages and they didn't get that deep into it.

  4. #4
    MacBook Air: USB Port - Powered?
    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    45,284
    Specs:
    27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, iPhone 6+, 3 iPods, Yosemite
    I would give Apple a call and ask, or better yet, walk into an Apple store and ask one of the technicians who work there. (Better known as a "genius")

    Apple portables can usually handle a variety of USB devices that one would normally find being sold in stores. However, every once in awhile you'll run across a device that draws too much current even when powered from an AC adapter.

    Regards.

  5. #5
    MacBook Air: USB Port - Powered?
    kgeier82's Avatar
    Member Since
    Dec 01, 2006
    Posts
    1,495
    Specs:
    MBP 2.4/2GB/200HD/256 8600gt
    MBA can do 1000mA I believe, while the rest of the notebooks can do 500mA

    this is per port.

    This is also why the superdrive for the MBA will not work with any other mac laptop, kinda dumb IMO.
    2.4ghz Unibody | Hitachi 320GB 7200 | 256MB 9600gt

  6. #6
    MacBook Air: USB Port - Powered?

    Member Since
    Feb 28, 2009
    Posts
    26
    I think you will find the usb port on the Macbook Air when powering the Air Superdrive puts out 1.5 amps! Which is why the Air superdrive will not work on any other computer

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Apple's new Ivy Bridge-powered MacBook Pro, Air benchmarked
    By OneMoreThing... in forum Apple Rumors and Reports
    Replies: 0
    Last Post: 06-12-2012, 06:20 PM
  2. Targus 7 Port Powered USB hub and iPad2
    By Iatros55 in forum iPad Hardware and Accessories
    Replies: 0
    Last Post: 09-09-2011, 04:44 PM
  3. Rumor: Apple testing new MacBook Air powered by same A5 processor as iPad 2
    By OneMoreThing... in forum Apple Rumors and Reports
    Replies: 23
    Last Post: 06-06-2011, 10:37 AM
  4. Replies: 8
    Last Post: 12-24-2008, 11:45 PM
  5. What is the Most idea USB Port Replicator for MB Air ?
    By danger450 in forum Other Hardware and Peripherals
    Replies: 0
    Last Post: 08-07-2008, 07:47 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •