Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

USB was recognised and now isn't!

Last night I was downloading things off of a USB (plugged into keyboard), however this morning it has not been recognised. I did leave it plugged in over night?!?


I have tried other ports.


Please help, I've got so much to do before tomorrow morning!!!


Thanks

iMac

Posted on Apr 1, 2012 1:43 AM

Reply
11 replies

Apr 1, 2012 2:14 AM in response to Jen642

Remove the USB drive, if the icon is showing on the desktop right click it and select Eject.


Once removed, clicks the Apple Logo in the top left hand corner and select Force Quit.


From the Force Quit window, click Finder, the button in the lower right hand corner will say Relaunch. click Relaunch and Finder (your desktop environment) will reload itself.


Once done, reconnect your USB drive and it should be recognised.


If it isn't, remove the drive and restart your machine, but reset the PRAM before it restarts, by holding down the R, P, Alt (option) and Ctl keys together (it's a two hand job, Alt + R with left hand Ctl + P with the right hand) keep holding all keys, the start up sound will sound, your system will reboot again, the start up sound will be louder the second time.


Depending on which version of the OS you have installed, you can release the keys after the second start up sound or keep holding them down until you hear a third start up sound. Then you can release the keys and your system will restart normally.


Once the desktop has loaded, connect your device and see if it's recognised.

Apr 1, 2012 3:54 AM in response to Jen642

Don't give up too easily!


The USB socket on your keyboard is USB1 (slower), the ones on the back of your Mac are USB2 (faster).


USB and Firewire information:


http://support.apple.com/kb/HT1151?viewlocale=en_US


http://support.apple.com/kb/HT4049?viewlocale=en_US


Try an SMC reset:


Resetting the SMC (System Management Controller) on Intel-based Macs:


http://support.apple.com/kb/ht3964


Resetting your Mac's PRAM and NVRAM:


http://support.apple.com/kb/ht1379

USB was recognised and now isn't!

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple ID.