External USB Speakers Unrecognized After 10.5.2

After installing the 10.5.2 update, my USB speakers (Logitech Z-10) are no longer recognized. I've unplugged them, logged in and out, and restarted multiple times.
Is anyone else experiencing this or does any have suggestions?

Where they plugged in when you ran the update? If they were, it's possible the driver was in use and couldn't be replaced. Can you unplug them and re-install the 10.5.2 update?
-Doug

Similar Messages

System preferences -Sound does not see external USB speakers

The computer internal speakers are working OK but the problems come when I try to use external USB speakers. The previous volume problem of the imnternal speakers resolved itself.
I have now purchased a new USB set of speakers (BOSE Companion 20) but now they will only work through the "headphone" slot at the rear of my Imac and then only thru one speaker.(right)
I have reset the PRAM - anyway I followed all the instructions and it was not solved.
In "Sounds" in system preferences the Imac cannot see the USB speakers - it only recognises the internal speakers for output.
I think until "sounds" recognises the USB Speakers I will not get both speakers working.
I insert the USB speaker wiring pin in the Headphones slot at the back of the Imac and as mentioned sound only comes thru the right USB speaker -nothing works when I put the pin in the speakers slot alongside the Headphones slot.
Any help apprecaited

The computer internal speakers are working OK but the problems come when I try to use external USB speakers. The previous volume problem of the imnternal speakers resolved itself.
I have now purchased a new USB set of speakers (BOSE Companion 20) but now they will only work through the "headphone" slot at the rear of my Imac and then only thru one speaker.(right)
I have reset the PRAM - anyway I followed all the instructions and it was not solved.
In "Sounds" in system preferences the Imac cannot see the USB speakers - it only recognises the internal speakers for output.
I think until "sounds" recognises the USB Speakers I will not get both speakers working.
I insert the USB speaker wiring pin in the Headphones slot at the back of the Imac and as mentioned sound only comes thru the right USB speaker -nothing works when I put the pin in the speakers slot alongside the Headphones slot.
Any help apprecaited

IMac - External USB Speakers

Why does new iMac not recognize external usb speakers when connected to the back of the unit. It only recognizes them when connected to a usb hub or the additional usb ports on the wired keyboard? I'm receiving distortion from dac which I suspect is due to low signal strength.

there is no such thing as usb speakers
all usb speakers being that usb don¨'t carry audio at all
are usb audio cards usb audio cards require drivers if the usb audio card model you own does not have
drivers included in Mavericks you need to install the drivers from the usb audio card makers site if they does not
support Mavericks with their drivers your speakers will not work

Crackling and pulsating noise in external USB speakers

How to eliminate crackling and pulsating noise in external USB speakers?

i need to access the Roland's knobs while sitting at the Mac (am using them as monitors in recording etc), so there really isn't a good place to get them further away. By interface, do you mean the PreMobile? that's an interesting idea. I've now tried that (via the line out, the rolands have a single 3.5mm cable, no RCAs); it got rid of the static noise, but the still a loud hum, and the PreMobile apparently doesn't monitor ordinary system sound output (like iTunes). But this experiment does point to the iMac itself being the source of the static noise.
The only AC-powered periphs in the loop are a couple hard drives and a printer (and a USB-powered Wacom tablet; the PreMobile is USB-powered as well).
I've got the speakers plugged into same grounded strip as the mac and the peripherals, trying to minimize ground loop, but it doesn't help.
Someone suggested a ground loop isolator gadget... anyone had success with those?

Lose connection to external USB hard drive after waking up from sleep

My Mac lost connection to the external USB hard drive after waking up from sleep. I can still see the folders in the hard drive in Finders, but when I double clip a folder no file within the folder is displayed. I have to reconnect the hard drive with iMac to read its contents.
May I ask how this happens and is there a solution?
I'm using Paragon NTFS for Mac OS X to read from and write to NTFS format of USB external hard drive.
Thanks!

... I un-ticked the "put hard disks to sleep when possible" option in the Energy Saver panel in the System Preferences, and it seems the problem is solved. will have to sleep and wake up my iMac to further verify if this is the solution ...
Alternative advices are always greatly appreciated!

Connecting USB Speakers to 2013 iMac without Airplay?

Have new 27" iMac (Intel i5 May 2013 build) and find no way to hook up external USB speakers. System's preferences offers no external opiton beyond Airplay which I hope to avoid. I don't know the distinction between USB 2 and USB 3, but wonder if my two year old speakers have an older version of USB connection and whether it will work. Thanks for any help with this newbie question.

Thanks, BD. I've been reading about target disk mode which sounds like it might be an appropriate solution for getting my photos and music to the new iMac. If I understand it, it sounds like I would connect the old MBP to the new iMac with a Firewire 800 cable (with Thunderbolt adapter for the iMac). The iMac would be running while the old MBP would be started up in Target Mode -- either by holding the T key while booting, or by restarting after selecting the Systems Disk in System Preferences>Mac HD>Restart. The target MBP should come up in Target Mode and mount in the Finder on the iMac. This should allow copying the iTunes Files from the MBP to iTunes on the iMac. Similarly I've read this would enable me also to copy the iPhoto Library from the Pictures Folder of the MBP to the Pictures Folder of the iMac. I'm nervous about whether copying is a simple drag-and-drop, or perhaps a multistage process that requires knowing where precisely to place the new files. The process on the iTunes seems critical since I'm moving 125 GB. Still, the concept seems like it might be relatively straight forward as long as I don't get confused about which computer is which, and whether I am dealing with the files themselves or the whole Library folder. In the case of iPhoto, I believe I'm copying the whole Library from Pictures on MBP to Pictures on iMac. On the iTunes, I'm not sure if I'm copying the files into the iMac iTunes, or simply copying the Library from MBP Music to iMac Music. If you have any insight on Target Mode, it might help me decide whether that's the way to go. Thanks for your replies. It's nice to know someone out there actually understands this stuff. Best, Dean

Samson Studio GT USB Speakers no longer recognized

All,
I have 2 MacBooks with Yosemite on them. I have the Studio GT external USB speakers. Now, what seems to be randomly, the speakers are not visible in system preferences under sound. I follow the mfg instructions of, plug them into the wall, plug in the usb, turn them on. The mac will recognize them. This use to work but no longer. Now, when I do that, there is nothing int he system preferences. The power light is on the speaker and they have an input for a mic. If I use the mic, the sound comes out of the speakers so I know the speakers work. Also, since these do not work on both MacBooks, but did in the past, has me suspicious. Both MacBooks are running Yosemite 10.10.2. Not only is it not displayed in system preferences / sound but its not displayed in the system report. Nothing appears to be plugged into the USB port but the speakers are.
Any help is appreciated!!!!
Thanks in advance.

Hey there W_Ray,
It sounds like these USB speakers aren't working correclty on either of 2 computers, not even if you power cycle them. Normally that would indicate an issue with the speakers themselves, but if you would like to, you can try troubleshooting for USB issues on one or both of the Macs with this article:
OS X Yosemite: If a USB device isn’t working
Check power and cables:
Make sure the USB device is turned on and its cables are properly connected.
Check for missing software:
Make sure you installed the latest software for your device. Visit the manufacturer’s website for any updates.
If the device is connected to a USB hub:
Make sure the device and the hub are the same speed. Connect USB 3.0 SuperSpeed devices to a USB 3.0 SuperSpeed HUB, USB 2.0 Hi-Speed devices to a USB 2.0 Hi-Speed hub, and so on.
If the device doesn’t have a power cord and is plugged into another USB device that doesn’t have a power cord:
Try plugging the device directly into your computer’s USB port or into a USB device that does have a power cord. You might need to disconnect and reconnect the other device as well, if it has stopped responding.
If you have many devices connected to your Mac:
Disconnect all USB devices except the device you’re testing, an Apple keyboard, and an Apple mouse. Make sure that the device is connected directly to the computer, and that any hubs or extension cables are disconnected. If you can use the device now, the problem may be with one of the other USB devices or hubs you had connected to your computer. Try reconnecting them, one by one, to your computer. When you find the device causing the problem, review its documentation for further troubleshooting steps.
Verify that the device appears in System Information:
Choose Apple menu > About This Mac. In the window that appears, click Overview, then click the System Report button to open System Information.
In the window that appears, see if the USB device is listed below Hardware in the Contents list. If the device appears but does not work, review the device’s documentation for further troubleshooting steps.
Restart apps:
Quit and restart any apps that use the device.
Restart your Mac:
Choose Apple menu > Restart.
Thank you for using Apple Support Communities.
Take care,
Sterling

External USB keyboard does not work with T60 after BIOS upgrade

External USB keyboard does not work properly with T60 after 2.26-1.07 BIOS upgrade.
It does the same with or without the docking station.
Anyone else bumped into this problem yet?
Has someone found any fixes for this?
t

Hi and welcome the forum!
Try uninstalling all USB hub devices from the device manager and reinstalling them again, particularly the keyboard's.
v2.26 is supposed to fix the issue according to lenovo:- http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-63024
Hope it helps.
Maliha (I don't work for lenovo)
ThinkPads:- T400[Win 7], T60[Win 7], IBM 240[Win XP]
IdeaPad: U350
Apple:- Macbook Air [Snow Leopard]
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External USB Hard Drive Can't Be Safely Removed After Boot Camp 3.1 Install

I just wanted to report that I've done multiple installs of Windows 7 Ultimate 64-bit on my MacBook 4,1 and although I've had no problem using the cmd workaround ( http://www.zath.co.uk/how-to-install-windows-7-on-apple-mac-boot-camp/ ) to install the 64-bit Boot Camp drivers that come with the Mac OS X 10.6 Snow Leopard retail DVD, I have found that by installing the Boot Camp 3.1 drivers on the same system, under no circumstance can I click the the "Safely Remove Hardware" icon in the system tray and not receive a message saying that ... "The device 'Generic Volume' cannot be safely ejected..." and that some program or service must be using it. However, a restart doesn't solve the problem any more than logging out does.
I read somewhere that part of the fix that Boot Camp 3.1 was intended to provide was to allow safe ejecting of the Macintosh HFS+ partition. Well, my external hard drive has three partitions: one NTFS, another NTFS, and a third HFS+ for Time Machine backups. I suspect, since I haven't seen anyone else reporting this issue, that it may simply be that the Boot Camp 3.1 drivers don't take into account the possibility of an HFS+ partition on external USB devices. Anyway, a System Restore to before Boot Camp 3.1 drivers were installed completely remedies the issue.
At this point, I'm not having any trackpad issues or anything else of note with respect to the original Boot Camp 3.0 drivers that came with the Snow Leopard retail disc, so I'm fine keeping those drivers installed and allowing Windows Update to update the Intel and Marvell drivers as it recommends. I just find it slightly amusing that the Boot Camp 3.0 drivers, which supposedly did not support Windows 7 (let alone the 64-bit version) work better than the 3.1 drivers which do supposedly support Windows 7. And the funny thing (or is it?) is that you have to install the original Boot Camp drivers with the cmd workaround before you're even able to update to the Boot Camp 3.1 drivers. Hilarious stuff there.
Proprietary gamesmanship is a big reason some of us prefer the Linux "share the ownership +for free+" model of computing. Just saying...
Anyone have any proper solutions (as in, other than "don't install the updates then!")?
bkadoctaj

I have a pair of external usb drives, one formatted for NTFS and the other for HFS+ connected through an external 7 port hub. I am running Windows 7 (64 bit) with bootcamp 3.1 on a late 2009 Mac BookPro. I share the same "safely remove hardware" issues you described. I always assumed it was because my external drives were connected through my external USB hub because of a similar issue I had running Vista (64 bit), but now I can confirm directly connecting the external USB HFS+ drive also yields the same "safely remove hardware" problem. Unfortunately for me, if I regress to the Bootcamp 3.0 drivers, my audio drivers, at times, fails to load. I would need to regress to Windows Vista (64 bit), the last environment where my iSight camera, internal speakers and all other hardware performed correctly. I would gladly, at this point, live with the "safely remove hardware" issue in exchange for a working iSight camera, the one and only hardware device lost to me in the move to Windows 7.

Installed Arch on external usb drive: Drive errors after reboot

I installed Arch on my external usb hard drive and everything seemed to be working fine. After rebooting though, I had a bunch of filesytem errors (ext3) and the system was unstable. I am guessing that this has to do with the unloading of the usb modules at shutdown. If this happens to early, then the root drive doesn't have a chance to shutdown properly, hence the filesystem errors.
Anyone know how to solve this?
Thanks!

EtreCheck looks at your log files for any kernel I/O errors. That is what it is reporting. EtreCheck just reports what it finds and tries to avoid judgements exception the most extreme cases. The drive might be OK. I am seeing more reports of this than I would have expected. It may just be a problem with Yosemite. It really prefers SSD disks in all cases. On my own machine, I have seen a slow external drive exhibit classic failure symptoms and sounds when connected via USB2. But then when I switched to FW800, it was fine. Other people are reporting that when they downgraded back to Mavericks, their disk errors went away.
So, I don't have a good answer for you. The drive might be bad, and it might be fine. Yosemite is definitely having problems with it. You may experience performance problems with that drive attached.

External USB 2.0 hard drive reconnects on its own after power-down

I have an external USB 2.0 hard drive which I'm trying to power off (after unmounting all partitions, of course) using:
$ udisksctl power-off --block-device /dev/sdb
When I do this, the drive spins back up after a few seconds. Only when I issue the same command again does the drive stay powered off.
I'm running:
linux 3.13.7-1
udisks2 2.1.3-1
This is what I see in the journal log when I:
- Plug in the drive's USB cable
- Issue the power-off command
- After the drive spins up again, issue the command again
Mar 29 19:51:01 miki-desktop kernel: usb 1-5: new high-speed USB device number 10 using ehci-pci
Mar 29 19:51:01 miki-desktop kernel: usb-storage 1-5:1.0: USB Mass Storage device detected
Mar 29 19:51:01 miki-desktop kernel: usb-storage 1-5:1.0: Quirks match for vid 1058 pid 0704: 8000
Mar 29 19:51:01 miki-desktop kernel: scsi12 : usb-storage 1-5:1.0
Mar 29 19:51:01 miki-desktop mtp-probe[21301]: checking bus 1, device 10: "/sys/devices/pci0000:00/0000:00:04.1/usb1/1-5"
Mar 29 19:51:01 miki-desktop mtp-probe[21301]: bus: 1, device: 10 was not an MTP device
Mar 29 19:51:02 miki-desktop kernel: scsi 12:0:0:0: Direct-Access WD 5000BMV External 1.75 PQ: 0 ANSI: 4
Mar 29 19:51:02 miki-desktop kernel: sd 12:0:0:0: [sdb] 976773168 512-byte logical blocks: (500 GB/465 GiB)
Mar 29 19:51:02 miki-desktop kernel: sd 12:0:0:0: [sdb] Write Protect is off
Mar 29 19:51:02 miki-desktop kernel: sd 12:0:0:0: [sdb] Mode Sense: 23 00 00 00
Mar 29 19:51:02 miki-desktop kernel: sd 12:0:0:0: [sdb] No Caching mode page found
Mar 29 19:51:02 miki-desktop kernel: sd 12:0:0:0: [sdb] Assuming drive cache: write through
Mar 29 19:51:02 miki-desktop kernel: sd 12:0:0:0: [sdb] No Caching mode page found
Mar 29 19:51:02 miki-desktop kernel: sd 12:0:0:0: [sdb] Assuming drive cache: write through
Mar 29 19:51:02 miki-desktop kernel: sdb: sdb1 sdb2
Mar 29 19:51:02 miki-desktop kernel: sd 12:0:0:0: [sdb] No Caching mode page found
Mar 29 19:51:02 miki-desktop kernel: sd 12:0:0:0: [sdb] Assuming drive cache: write through
Mar 29 19:51:02 miki-desktop kernel: sd 12:0:0:0: [sdb] Attached SCSI disk
Mar 29 19:51:47 miki-desktop udisksd[21107]: Powering off /dev/sdb - successfully sent SCSI command START STOP UNIT
Mar 29 19:51:47 miki-desktop udisksd[21107]: Powered off /dev/sdb - successfully wrote to sysfs path /sys/devices/pci0000:00/0000:00:04.1/usb1/1-5/remove
Mar 29 19:51:47 miki-desktop kernel: usb 1-5: USB disconnect, device number 10
Mar 29 19:51:47 miki-desktop kernel: usb 2-5: new full-speed USB device number 9 using ohci-pci
Mar 29 19:51:48 miki-desktop kernel: usb 2-5: not running at top speed; connect to a high speed hub
Mar 29 19:51:48 miki-desktop kernel: usb-storage 2-5:1.0: USB Mass Storage device detected
Mar 29 19:51:48 miki-desktop kernel: usb-storage 2-5:1.0: Quirks match for vid 1058 pid 0704: 8000
Mar 29 19:51:48 miki-desktop kernel: scsi13 : usb-storage 2-5:1.0
Mar 29 19:51:48 miki-desktop mtp-probe[21555]: checking bus 2, device 9: "/sys/devices/pci0000:00/0000:00:04.0/usb2/2-5"
Mar 29 19:51:48 miki-desktop mtp-probe[21555]: bus: 2, device: 9 was not an MTP device
Mar 29 19:51:49 miki-desktop kernel: scsi 13:0:0:0: Direct-Access WD 5000BMV External 1.75 PQ: 0 ANSI: 4
Mar 29 19:51:49 miki-desktop kernel: sd 13:0:0:0: [sdb] 976773168 512-byte logical blocks: (500 GB/465 GiB)
Mar 29 19:51:49 miki-desktop kernel: sd 13:0:0:0: [sdb] Write Protect is off
Mar 29 19:51:49 miki-desktop kernel: sd 13:0:0:0: [sdb] Mode Sense: 23 00 00 00
Mar 29 19:51:49 miki-desktop kernel: sd 13:0:0:0: [sdb] No Caching mode page found
Mar 29 19:51:49 miki-desktop kernel: sd 13:0:0:0: [sdb] Assuming drive cache: write through
Mar 29 19:51:49 miki-desktop kernel: sd 13:0:0:0: [sdb] No Caching mode page found
Mar 29 19:51:49 miki-desktop kernel: sd 13:0:0:0: [sdb] Assuming drive cache: write through
Mar 29 19:51:52 miki-desktop kernel: sdb: sdb1 sdb2
Mar 29 19:51:52 miki-desktop kernel: sd 13:0:0:0: [sdb] No Caching mode page found
Mar 29 19:51:52 miki-desktop kernel: sd 13:0:0:0: [sdb] Assuming drive cache: write through
Mar 29 19:51:52 miki-desktop kernel: sd 13:0:0:0: [sdb] Attached SCSI disk
Mar 29 19:52:20 miki-desktop udisksd[21107]: Powering off /dev/sdb - successfully sent SCSI command START STOP UNIT
Mar 29 19:52:20 miki-desktop udisksd[21107]: Powered off /dev/sdb - successfully wrote to sysfs path /sys/devices/pci0000:00/0000:00:04.0/usb2/2-5/remove
Mar 29 19:52:20 miki-desktop kernel: usb 2-5: USB disconnect, device number 9
What is interesting is that on first connect, the drive is using ehci-pci driver, then after the first try powering it off, the drive appears to reconnect using the ohci-pci driver. Not just that, it appears to 'jump' from one USB bus to another. How is this even possible?
$ lspci
00:00.0 Host bridge: NVIDIA Corporation MCP73 Host Bridge (rev a2)
00:00.1 RAM memory: NVIDIA Corporation nForce 630i memory controller (rev a2)
00:01.0 RAM memory: NVIDIA Corporation nForce 630i memory controller (rev a1)
00:01.1 RAM memory: NVIDIA Corporation nForce 630i memory controller (rev a1)
00:01.2 RAM memory: NVIDIA Corporation nForce 630i memory controller (rev a1)
00:01.3 RAM memory: NVIDIA Corporation nForce 630i memory controller (rev a1)
00:01.4 RAM memory: NVIDIA Corporation nForce 630i memory controller (rev a1)
00:01.5 RAM memory: NVIDIA Corporation nForce 630i memory controller (rev a1)
00:01.6 RAM memory: NVIDIA Corporation nForce 630i memory controller (rev a1)
00:02.0 RAM memory: NVIDIA Corporation nForce 630i memory controller (rev a1)
00:03.0 ISA bridge: NVIDIA Corporation MCP73 LPC Bridge (rev a2)
00:03.1 SMBus: NVIDIA Corporation MCP73 SMBus (rev a1)
00:03.2 RAM memory: NVIDIA Corporation MCP73 Memory Controller (rev a1)
00:03.3 Co-processor: NVIDIA Corporation MCP73 Co-processor (rev a2)
00:03.4 RAM memory: NVIDIA Corporation MCP73 Memory Controller (rev a1)
00:04.0 USB controller: NVIDIA Corporation GeForce 7100/nForce 630i USB (rev a1)
00:04.1 USB controller: NVIDIA Corporation MCP73 [nForce 630i] USB 2.0 Controller (EHCI) (rev a1)
00:0a.0 PCI bridge: NVIDIA Corporation MCP73 PCI Express bridge (rev a1)
00:0b.0 PCI bridge: NVIDIA Corporation MCP73 PCI Express bridge (rev a1)
00:0c.0 PCI bridge: NVIDIA Corporation MCP73 PCI Express bridge (rev a1)
00:0d.0 PCI bridge: NVIDIA Corporation MCP73 PCI Express bridge (rev a1)
00:0e.0 IDE interface: NVIDIA Corporation MCP73 IDE (rev a2)
00:0f.0 Ethernet controller: NVIDIA Corporation MCP73 Ethernet (rev a2)
01:06.0 Multimedia audio controller: C-Media Electronics Inc CMI8738/CMI8768 PCI Audio (rev 10)
02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV710 [Radeon HD 4550]
02:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] RV710/730 HDMI Audio [Radeon HD 4000 series]
$ lsusb
Bus 001 Device 009: ID 1058:0704 Western Digital Technologies, Inc. Passport External HDD
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 007: ID 15ca:0101 Textech International Ltd. MIDI Interface cable
Bus 002 Device 003: ID 04d9:1603 Holtek Semiconductor, Inc. Keyboard
Bus 002 Device 002: ID 046d:c001 Logitech, Inc. N48/M-BB48 [FirstMouse Plus]
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Before the first power-off attempt:
$ lsusb -t
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ohci-pci/10p, 12M
|__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 2: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 2: Dev 3, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 4: Dev 7, If 0, Class=Audio, Driver=snd-usb-audio, 12M
|__ Port 4: Dev 7, If 1, Class=Audio, Driver=snd-usb-audio, 12M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/10p, 480M
|__ Port 5: Dev 9, If 0, Class=Mass Storage, Driver=usb-storage, 480M
After the first power-off attempt:
$ lsusb -t
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ohci-pci/10p, 12M
|__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 2: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 2: Dev 3, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 4: Dev 7, If 0, Class=Audio, Driver=snd-usb-audio, 12M
|__ Port 4: Dev 7, If 1, Class=Audio, Driver=snd-usb-audio, 12M
|__ Port 5: Dev 10, If 0, Class=Mass Storage, Driver=usb-storage, 12M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/10p, 480M
Does anyone know how to fix this problem? Is it a device quirk, a driver bug or something?
Last edited by ackalker (2014-03-29 19:21:04)

Just to be sure, I rebooted my system, shut down lightdm from another VT, made sure that really nothing is using the drive, no partitions are mounted, no services that could try to use the drive (except udisks2.service, could this one be the problem? But how am I supposed to use the udisksctl command when the service isn't running?).
Tried the same command again. same result: I needed to run it twice in a row for it to 'take'.
What I find even more fascinating: how can a USB device jump from one USB bus to another like that? I've honestly never seen anything like this before :-)
Last edited by ackalker (2014-03-29 19:35:29)

External USB drive won't mount after 10.9.5 upgrade

Is anyone else reporting the following issue? Immediately after installing OS X update 10.9.5 (13F34) on 09/18, my external USB drive (IOMega 1GB OS X Extended FS) used for Time Machine would no longer mount and isn't recognized. When I look at the drives in finder, it is missing. However, it does show up under the USB Hi-Speed Bus device tree:
USB Mass Storage:
Product ID:    0x0376
Vendor ID:    0x059b (Iomega Corporation)
Version:     0.00
Serial Number:    ABCDEF012314E2ED
Speed:    Up to 480 Mb/sec
Manufacturer:    Iomega
Location ID:    0x1a120000 / 3
Current Available (mA):    500
Current Required (mA):    0
Console message when device plugged in:
10/6/14 3:22:31.000 AM kernel[0]: USBMSC Identifier (non-unique): ABCDEF012314E2ED 0x59b 0x376 0x0, 2
mount command results:
devfs on /dev (devfs, local, nobrowse)
map -hosts on /net (autofs, nosuid, automounted, nobrowse)
map auto_home on /home (autofs, automounted, nobrowse)
/dev/disk1s2 on /Volumes/Mac-Mini 2 (hfs, local, nodev, nosuid, noowners)
System is Mac-Mini (late 2012), 2.5 Ghz i5, 8GB ram, 500GB local storage, 1TB on second Firewire disk for media, 1TB USB disk for Firewire (PROBLEM)
I have reinstalled the combined 10.9.5 OS upgrade, and verified that the drive works when connected to my other MB Pro (mid-2012 running Yosemite beta 3). There is no third party software that I'm aware of in use for this drive, as it's only for Time Machine backups.
Thanks

Is the drive's icon on the desktop (perhaps behind another icon, which is possible if Finder > View > Cleanup is enabled)?
If not, is the box Finder > Preferences > General > External Disks checked?
Is the drive listed in every Finder window's sidebar?
If not, is the box Finder > Preferences > Sidebar > External Disks checked?
Are Time Machine backups to the drive happening on schedule?
If not, does the drive appear in System Preferences > Time Machine > Select Disk?
Can you open /Volumes/Mac-Mini 2/Backups.backupdb using Finder > Go > Go to Folder...?
Does the drive appear in Disk Utility? Is it (or can it be) mounted there?
Have you tried to plug it in to a USB port on the Mini (not a hub) or into a different USB port on the Mini?
Have you tried this: shut down; unplug the drive; boot the Mac; after you have logged in and the Finder is done populating the desktop and menu bar, plug the drive in?

USB port gone after ejecting external HDD

All software uptodate.
I have strange issue with USB ports. After ejecting USB drive (external HDD, powered by USB bus), which worked perfectly, USB port does not recognize anything, nor providing power. Turning MBP off and then booting back solves this issue.
Any ideas?

After some time I connected external HDD to "dead" port again. And got power. But still no devices recognized on this port. For example: iPad does not charge, not recognized.

Why is my external USB audio card not found after Lion install

Above says it all. Since installing Lion my external USB audio card is not recognized. This is a very plain vanilla card. I worked fine with Snow Leopard. No additional drivers required. But with Lion, nada. Any help would be greatly appreciated.

It just happened to me. Exactly as Ritcho described. After install fine, after restart, gone. FYI for anyone with the same issue as I had. I was using a Diamond USB dongle to connect my external monitor to the iMac, it was legacy from when I was running a couple of external monitors from my MacBook Pro using them. I took the dongle out of the chain and replaced with a standard Apple DVI to Mini DVI adapter and plugged it into the mini dvi port in the iMac and I was golden. Now to sell the Diamond dongles.

External UCube speakers don't work after awakening from sleep mode since 10.7.5 upgrade

Ever since I upgraded to 10.7.5 when I wake my computer from sleep mode...my external UCube speakers don't work unless I unplug them and plug them back in. I've already tried resetting the SMC. It recognizes and shows the speakers in the sound preferences...but no sound unless I reconnect the usb cable. Worked fine in 10.7.4
Any ideas? Its ridiculous all the audio problems being reported.

I have a mac mini (A1283) with OS 10.7.4. Upon upgrading to 10.7.5 it did not start up again. Instead, the light was on and the hard drive did not start up. The light on the connected USB mouse was not lit.
My solution:
Cold start with Command-v pressed.
This should start Verbose mode (see http://support.apple.com/kb/HT1492 ).
What happened on my mac mini was that the grey startup screen with the Apple logo appeared for a long while before the login screen came.
Maybe Cmd-v set open firmware params and fixed some corruption.
Anyway: my mac mini works again.

External USB Speakers Unrecognized After 10.5.2

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