OSX Hangs on Startup when USB Devices Connected

Hi,
I'm running 10.5.4 (having trouble updating to .5) and whenever i restart my macbook with a flash drive or external HD connected it won't start up properly. It gets to the screen with the apple logo and then it stays at a blue screen until i pull out the USB devices. I also have an external firewire drive which does not effect startup.
Any suggestions would be greatly appreciated.

Hmmm ... I am having similar problems when I try to boot from an external firewire drive. Using SuperDuper to create/maintain a boot backup on external drive. Now when I try to boot from external drive to verify OK, hangs at blue screen. Maybe will try setting to use external drive before restart and see if that forces through. Not an ideal long term as rather negates the point of the backup in case of catastrophic failure of internal drive. AND a touch dangerous if boot still doesn't work ?
I don't have any USB drives or flash drives attached, and WD raid is switched off.

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The USB ports worked fine on my old MSI motherboard, so it would appear to be something related either to the new motherboard or to the drivers.
I have the latest motherboard drivers and Windows updates, so I don't know what else to try, or why this problem is occuring. The USB jumpers are connected correctly onto the motherboard.
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Reproducible Freeze on Wakeup (when USB devices connected)

When I bought Leopard, I also bought a Buffalo 500GB drive for use with Time Machine.
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- HD plugged in (powered off)
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- HD not in
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Message was edited by: a brody

HT3986 Why my Boot Camp keep saying that there is no USB device connected ?

I use Mac Air, and with a external CD device. When I try to install Window 7, it keep saying that there is no USB device connected when there is.

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Hi, I've been using my Zen Touch fine for a few weeks now, but recently changed my home computer's OS to XP Home. After reinstalling all the Zen Touch drivers and s/w (including the latest versions off this website) the computer no longer recognises the player when i attatch it to any of my USB ports.
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I have a feeling that I had the player connected the first time I installed the drivers after changing my OS, would this have the fatal effect that I'm now experiencing?
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MSI P43 won't boot with usb devices connected

My system:
MSI P43 Neo
Intel Core 2 Duo E8400
NorthQ Black Magic 850 watt PSU
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Googled on "computer not booting with usb code 6b38" and found this:
Quote
****SLOW BOOT-UP in POST SCREEN****
P.S. If you see the BIOS code 6B38 in the bottom right corner of the screen, this is a indication that USB Legancy support is enabled in the BIOS. If this is enabled and you have any usb devices attached such as a external USB Hard drive, your system will take ages to go through the POST boot screens.
So disable this setting in the BIOS and the system will then boot in a matter of Seconds
From:
http://www.rebelshavenforum.com/sis-bin/ultimatebb.cgi?ubb=get_topic;f=30;t=000250
Also try and see if a clear CMOS will help, some people suggested that from a old post from MSI forum here, saying its bios 1.3 thats bugged.
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How do I switch my phone to transfer mode when USB is connected to my computer?

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click to open & the sd card can be viewed.

I can't syncronize my library and my new device. I deleted old one but nothing change.I can't only add sth in library when my device connected.

I was using iPod touch before and I bougth new iPhone 5S.I change my apple id.Now I can't syncronize my library and my new device. I deleted old one but nothing change.I can't only add music,videos etc in library when my device connected.I tried to delete iTunes and set up again but it doesn't work. It's really hard to using like this. I always add new things at iTunes when my device doesn't connected. Please help me

You reinstalled an old version of iPhoto after you updated your library to the newer version.
Update ALL your software and try again.
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Repeat until it tells you there are no more updates.
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My Mac Mini doesn't start up when usb devices are plugged in.
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Haha. I just restarted it and it worked. Instead of turning it off and on. But thanks.
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Note: It is possible that the SMC could encounter an issue that may cause unusual system behavior typically related to the symptoms described below. In some cases, resetting the SMC may be the only correct method to resolve the issue, however, an SMC reset should only be attempted after all other standard troubleshooting has been performed.
So I hope it is fixed for now. But could someone also post another solution?

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Processor 2.5 GHz Intel Core i5
Memory 4 GB 1600 MHz DDR3
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- I really don't want to clutter up my system anymore than I have to for a project that's only going to take a few weeks.
- I don't mind swapping hard drives... it takes two minutes, and I have an empty ssd just sitting on the shelf.
So, back to my original question. Can I just swap the computer's drives, then install Ubuntu on the second drive and be good to go without any harm to my MacBook Pro or OSX on the other drive (which wouldn't be connected when Ubuntu is running)?
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Hi,
bought a new 13,3" Retina Macbook Pro.
When I have my wired Apple Keyboard connected to the Macbook and connect an usb-device with the keyboard, from time to time the keyboard and the usb-device gets diconnected and mac osx tolds me, that there is not enough power for the devices. After a few seconds the keyboard and the device gets mounted again.
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kernel: USB Notification: The hub "Keyboard Hub" has reported an overcurrent condition. Port 3 has been disabled.
Is my Macbook broken?

You can try SMC and NVRAM resets:
http://support.apple.com/en-us/HT201295
http://support.apple.com/en-us/HT204063
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Ciao.

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Any suggestions for a fix?

I re-installed the 10.7.2 combo. It booted up with a non powered usb 4 port hub but it disabled it. Plugging it out then in again and it works. Looks like the USB firmware has changed somehow in 10.7.2, The hub works on PC's at work no problem, and it worked on the MBP without issue previously. Its not just the non powered hub its a powered hub, and other devices.
Any solutions?

Output sound distortion when USB Mic Connected

Hi everyone,
Really appreciate anyone’s help on this sound distortion problem.
I have been using the new 2014 iMac 27' for last 8 Months, bought Brand New, and recently updated to Yosemite. Everything worked fine including recording, until this update.
I'm using Blue Yeti USB Mic for recording, and few days after the update I was trying to record in GarageBand and the output sound (via headphone connected to USB MIc) started to distort and then suddenly dropped the bitrate/ sound and I could only hear some clicks. I reinstalled the GargeBand, still its the same distortion happens. The sound gets back to normal, only for few seconds, after I unplug the USB cable from the Mic device. And I tried changing the bit rate and again sounds starts to drop after few sec. This happens only when I connect the Blue Yeti USB Mic and sound output from the Mic itself. Same thing happens with iTunes as well. Output sound from Internal mic and speakers are working fine as normal.
I tried connecting the USB Mic to my Windows laptop and its working fine with the Cubase 5 without any problem. So the problem is with the output sound, when external Mic connected.
I don’t know the solution for this. Have checked on every single blog/ thread, sill couldn’t find the answer I’m looking for, to fix this.
It would be great if you have any kind of a solution for the same.
Info : FYI
Mac
OS X Yosemite: Version 10.10.2
iMac (27-inch, Late 2013)
Processor : 3.2 GHz Intel Core i5
Hard-drive : 1 TB SATA Disk
Ram: 8 GB 1600 MHz DDR3
Graphics: NVIDIA GeForce GT 755M 1024 MB
Built-in Output:
Default System Output Device:       Yes
Manufacturer:                                  Apple Inc.
Output Channels:                             2
Current SampleRate:                      48000
Transport:                                        Built-in
Yeti Stereo Microphone:
Default Input Device:                      Yes
Default Output Device:                    Yes
Input Channels:                               2
Manufacturer:                                 Blue Microphones
Output Channels:                            2
Current SampleRate:                      48000
Transport:

Nope. The larger buffer didn't work. What did work was running a cord out of the 1/4-inch jack from the direct box to a 1/4-to-1/8-inch adapter and then into the mic/line-in jack on my computer. I set GarageBand to use the built-in line-in and had no static problems. It's a stopgap until this gets fixed.
A post by LinuxMercedes on Oct. 3 at http://discussions.apple.com/message.jspa?messageID=8158914 may provide a solution.

Stand-by / sleep mode not working when USB is connected

Hello!
When the USB cable from my 24" LED Cinema Display is connected to my new Mac Pro 2,66 GHz Quad-Core, the stand-by / sleep mode does not work correctly: the Mac Pro goes to sleep normally, then the LED behind the on-/off-button flashes one time and then the Mac Pro awakes from sleep mode without any user interaction.
I already tried to reset PRAM, I tested all three rear-side USB connectors (I did not test the front-side USB connectors because the display's cable is way too short), I unplugged all other USB and Firewire devices and also tried sleep mode from a freshly created account. Alas, nothing helps.
As soon as the display's USB connector is plugged in, sleep mode does not work any more. It even doesn't matter if there are USB devices plugged into the display. Without connecting the display's USB plug, sleep mode works fine.
So, any ideas out there?
Thanks in advance & best regards!
Mario.

I fixed the problem, so I just post this to help others that might run into the same trouble.
The Mac Pro and the display were connected to a master/slave power socket. The problem is: when the Mac Pro goes to sleep, there still seems to be some power left in the display (which socket is switched off by the master/slave power socket). Therefore, the display goes off slightly after the Mac Pro. This powering off seems to release a signal on the display's USB wire that is connected to the Mac Pro and therefore switches the Mac Pro on again.
So, this is the same effect as removing a USB device from the Mac during sleep mode, what (at least in most cases) also starts up the Mac again.
As a result, there seems to be no other solution to this problem than removing the display from the master/slave power socket. Sadly enough, the LED Cinema Display consumes other 2 watts in stand-by mode...
Cheers!
Mario.

OSX Hangs on Startup when USB Devices Connected

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