Go Back   MacRumors Forums > Apple Hardware > Notebooks > MacBook Air

Reply
 
Thread Tools Search this Thread Display Modes
Old Nov 14, 2012, 12:14 AM   #1
onthecouchagain
Banned
 
Join Date: Mar 2011
USB 3.0 and 2.0

Question: I have an old MacBook Air that has USB 2.0's... can I still buy an external hard drive that uses USB 3.0? The wires that come with the ext HD will still fit and work with my Mac?

Yes? I'm a little confused by the "direction" of the backwards compatibility.

Thanks in advance.
onthecouchagain is offline   0 Reply With Quote
Old Nov 14, 2012, 12:40 AM   #2
MacPat333
macrumors regular
 
Join Date: Sep 2012
Location: Dubai
You can do so only if the external harddrive is compatible with USB 2.0 as well as 3.0.

If it only runs USB 3.0 it won't work with your MBA!
MacPat333 is offline   0 Reply With Quote
Old Nov 14, 2012, 12:42 AM   #3
flyguy206
macrumors 6502a
 
Join Date: Aug 2008
Yes it will work but at USB 2.0 speeds
flyguy206 is offline   1 Reply With Quote
Old Nov 14, 2012, 12:29 PM   #4
old-wiz
macrumors 604
 
Join Date: Mar 2008
Location: West Suburban Boston Ma
All USB 3.0 products are supposed to be backwards compatible with USB 2.0; there should be no problem using any USB 3.0 product with USB 2.0.
old-wiz is offline   1 Reply With Quote
Old Nov 14, 2012, 03:37 PM   #5
onthecouchagain
Thread Starter
Banned
 
Join Date: Mar 2011
Thanks, y'all.
onthecouchagain is offline   0 Reply With Quote
Old Nov 14, 2012, 05:23 PM   #6
KylePowers
macrumors 68000
 
KylePowers's Avatar
 
Join Date: Mar 2011
Quote:
Originally Posted by MacPat333 View Post
You can do so only if the external harddrive is compatible with USB 2.0 as well as 3.0.

If it only runs USB 3.0 it won't work with your MBA!
Quote:
Architecture and features
In USB 3.0 dual-bus architecture is used to allow both USB 2.0 (HIGH Speed/LOW Speed/FULL Speed) and USB 3.0 (Super Speed) operations to take place simultaneously, thus providing backward compatibility. Connections are such that they also permit forward compatibility, that is, running USB 3 devices on USB 2.0 ports. The structural topology is the same, consisting of a tiered star topology with a root hub at level 0 and hubs at lower levels to provide bus connectivity to devices.
http://en.wikipedia.org/wiki/USB_3.0
KylePowers is offline   1 Reply With Quote

Reply
MacRumors Forums > Apple Hardware > Notebooks > MacBook Air

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Similar Threads
thread Thread Starter Forum Replies Last Post
USB Love - Portable USB drive! Books, musics, movies in one app! curtschillingcs iPhone and iPod touch Apps 2 Dec 6, 2013 06:41 PM
USB Love - Portable USB drive! Books, musics, movies in one app! curtschillingcs iPad Apps 1 Dec 6, 2013 06:28 PM
Will a 2011 MBP support USB 3.0 on the Belkin dock or a new ATD with USB 3.0? bniu MacBook Pro 1 Feb 3, 2013 03:19 PM
USB-based install of Windows 7 on 2012 MBA - Choice of USB seems to be sensitive kylera Windows, Linux & Others on the Mac 5 Jun 30, 2012 01:57 PM

Forum Jump

All times are GMT -5. The time now is 09:03 PM.

Mac Rumors | Mac | iPhone | iPhone Game Reviews | iPhone Apps

Mobile Version | Fixed | Fluid | Fluid HD
Copyright 2002-2013, MacRumors.com, LLC