USB 3.0 hub recommendation?

I bought an Anker USpeed 7-port USB 3.0 hub that I thought would work great to allow me to connect 4 USB hard drives to my MacBook Pro (Retina, Mid 2012) and a few other USB devices (printer, keyboard, etc). It doesn't. Unfortunately this specific hub won't power any of the USB 2.0 or USB 3.0 hard drives I have. The hub works great for every othe type of USB device.
I'm looking for a recommendation for a new hub that would resolve this problem. Thoughts?

One hub I can tell you does not work is the HooToo HT-UH004.
This is a 7-port USB3 hub, that runs only at USB2 speeds on a MacBook Pro 15 inch Retina. The ports run at USB3 speeds with other devices.

Similar Messages

Looking for a USB 3.0 HUB recommendation....

I have bought at least 2 different USB 3.0 Hubs and while they work with my MBP Retina they only support devices at USB 2.0 speed. I have converted my Time Machine to a USB 3.0 Enclosure and when connected directly to my MBP Retina I get 3.0 speeds.
The two different devices I was able to find locally both had the same problem of only supporting 2.0 speeds when connected to Mac's. The models I bought were the Rocketfish and the Dlink. I am worried about buying and trying others and ordering thru the mail only to get them and they have the same problem and need to go back.
If there are any recommendations or suggestions I would much appreciate them.
Gregg
Phoenix, AZ

http://support.apple.com/kb/HT5172
May want to check this out on USB 3, talks about hubs - Did the ones you buy say anything on the website about 2008 Version 1 USB 3.0 Specification? Those are the only ones supported.

Which usb 3 hub recommended for desktop?

which is the best usb 3 hub recommended for desktop?

Juan Z wrote:
I have a Sonnet PCi USB3 card for my MacPro, and a Sonnet USB3 Express Card 34 for my MacBookPro, and they work properly on Lion 10.7.4. However, when I use a powered four-plug USB 3 hub, the card reader that worked directly to the Sonnet cards, now is not detected when used through the hub. I think that what I need is a Hub Driver that works with Lion 10.7.4...
I would suggest contacting Sonnet directly with that question. I spent over a year with their PCIe card trying to get it to work reliably in two Mac Pro's with 10.6, 10.7, and 10.8 and never succeeded because of the drivers, which are really modified LaCie drivers. Switching to a CalDigit card solved the problem. I don't use hubs so I don't know if the CalDigit would work with them, but I suspect that adding a USB 3.0 hub to the mix would only make shaky (in my experience at least) drivers even shakier.

Is there a USB 3.0 Hub that really works with the Mac Mini?

My Mac Mini's four USB 3.0 ports work fine with my four USB Seagate GoFlex 3.0 hard drives. The drives mount at startup, and perform at expected USB 3.0 speeds. But, when I connect the drives to a USB 3.0 HUB to free up the Mac's USB ports for other devices, typically two of the USB Seagate drives will mount at startup, but two won't. There's a fix for this: after startup, I simply disconnect AC power from the drives that didn't mount, and reconnect the power a few seconds later. Now all my drives are mounted, they perform properly, and other USB devices connected to other Mac Mini USB ports (a mouse, a USB midi interface) work just fine as well. It's annoying, though, to have to perform this extra disconnect-reconnect step every time. I've tried two different USB 3.0 HUBs -- one from Uspeed and one from Satechi -- and I have exactly the same problem with both. Question: Is anybody else experiencing the same thing with a late 2012 Mac Mini and a USB 3.0 Hub? Has anybody found a 3.0 Hub that doesn't have this issue with the Mac Mini?

The USB 3.0 hub instability problems extend beyond the Mac-Mini, as addressed below.
At long last we're seeing progress in getting 2012 Macs to work with USB 3.0 hubs. As discussed on this and other discussion groups I've had a horrible time with my MacBook Pro Retina being unstable with USB 3.0 hubs. I know many of you have also or you wouldn't be reading this posting.
In June 2012 I bought one of the first 2012 MacBook Pro's with a Retina display. It's been a battle since with Apple selling what appears to be an incompatible or unstable system to effectively communicate with the USB 3.0 hubs. You'll see vendors now making comments that Apple is the source of the problem.
I've been through USB 3.0 issues with two MacBook Pro Retina laptops. I've also tested a Uspeed hub, with 3 portable USB 3.0 drives connected, at the Apple Store. This was on a newer model MacBook Pro Retina, and also on a 27" iMac. All had instances where drives failed to mount during the short period allowed for testing. (Because of time constraints, we were unable to test at the Store for spontaneous and unprovoked unmounting of drives connected to the hub. These problems have existed since the beginning on my rMBP.)
I am now on my 20th hub that has been purchased, or provided for testing. They varied from 4-Port to 10-Port powered hubs and involved 11 brand names. Comments were posted on Amazon, Tiger, and others for most of the ones purchased, and some that were tested. Some, like the HooToo specifically warned against use with Macs in the manufacturer's manual and, as I learned, for good reason. That was reflected in my comments for the drive on Amazon.
The Plugable 7-Port USB 3.0 powered aluminum-finish hub that I have been testing since October 13 was provided by Plugable after the first one, purchased through Amazon, was returned as unreliable. This 3rd, and newer generation Plugable hub uses the VIA VL812 chipset with the new version 90.81 firmware. My experience over the last 4+ weeks with this hub has been solid. While there have been problems with Eject errors, none were traced to the hub electronics. (Problems with intermittent connections at the cable connectors appeared to be the cause of the disconnect errors. Almost all of the failures were traced to intermittent Micro-B connectors, but that's another story.)
In addition to the greatly improved reliability of this hub, I find several features of this Plugable to be a plus including:
The plug engages fully to the "hilt" when plugged into the hub giving a solid connection, as occurs on the MacBook Pro Retina USB 3.0 ports. Others hubs typically had a gap between the "hilt" of the connecting end, and the hub allowing for lateral movement. With some hubs this allowed for intermittent connections if the cable was disturbed.
The on/off switch on the hub allows the hub to be powered down when not in use.
The full size Type-B connectors on the cable at the hub end engage solidly. Hubs with Micro-B connectors have presented intermittent connections in the cable connector.
The aluminum case looks attractive with Macs, IMO, but not a reason to buy.
Overall, Plugable's support is the best I've encountered. I've found their response to questions to be prompt and thorough. This, coupled with their online support articles has put them at the top of my list. They provide news and information that I've not found with other hub vendors.
The article titled "Plugable USB 3.0 7 Port Hub Firmware History" at the below link gives insight into the history of the problems that we've been having with the USB 3.0 hubs on Macs and the firmware updates, regardless of the brand of hub you have. Apparently, if you have the VIA VL 812 chipset, firmware version 85.81, you're in safe territory.
http://plugable.com/2013/10/30/plugable-usb-3-0-hub-firmware-upgrades2
(One of the Plugable hubs appears identical to the black 7-Port Uspeed hub, and both use the VIA VL 812 chipset. They appear to be from the same manufacturer with the real difference appearing to be in the VL812 version of the firmware in the hub.)
Some of the firmware can be upgraded, and some can't. Contact Plugable or Anker if you're affected.
Uspeed has made improvements, but they were still unstable as of the last one I received for testing. In her last reply on 10/13/13 Sunnie with AnkerDirect Customer Support stated:
Unfortunately, the new Firmware version (908x) does not work with the model "68UNHUB-B7U" you have. The hub bellow has much less complaints about Mac issue. We suggest that you order this one.
http://www.amazon.com/gp/product/B009Z9M3DY
AnkerDirect Customer Support
Note that the above hub recommended by Anker has an 8th port just for charging iOS devices. Some will see this as a plus. However, the lack of such a port is not seen as a big problem. It's easy and relatively inexpensive to purchase extra 5V power adapters for charging, which is my preference. Plugging and unplugging devices on a hub that is powered "On" presents the potential for movement of the cables. This could interrupt a cable connection and disconnect a drive during data transfer resulting in corrupted files. With 7 and 10 port hubs, and all the cables needed, this gets risky.
I believe the USB 3.0 hub issues we're having are the result of poor design of the Mac's USB 3.0 implementation at the start. Unstable hubs that I've had a friend with Windows 7 test, said they "performed like a dream" on his PCs. This indicates the problem is with Macs, not the (twenty) hubs I've used.
A statement from a support person dealing with USB 3.0 hubs tells what's I've long suspected: " -- the evidence is pointing to something specific to the Apple design (perhaps external to the chipset, like the signal re-driver….."
If you're having USB 3.0 problems, be sure to let Apple know by sending in a Feedback comment to Apple at:
http://www.apple.com/feedback/
I'm told they read and treat the feedback seriously (although the duration of this USB 3.0 problem makes me wonder if Mavericks and iOS 7 haven't had a higher priority and distracted from this. Microsoft got USB 3.0 right, how about it Apple?)

USB 3.0 Hub Issue with W510 Please Help

I tried to search for this but no luck. I just bought a Syba 4-port USB 3.0 hub to use with my W510. After plugging in the power and then the USB cord, the drivers installed and everything seemed fine. After restarting the computer I noticed that I had lost Bluetooth (even the LED was off). I tried restarting again and using the Function-F5 keys but Bluetooth wasn't even an option. I disconnected the hub, restarted the computer, and was able to see and reenable Bluetooth. I repeated the problem, and now have resorted to hooking up the hub to my desktop. To make sure it wasn't a "hub" issue I tried a USB 2.0 hub with the laptop and it booted up just fine, with Bluetooth still enabled. Also, while I didn't confirm it, somehow I think plugging the Syba hub in (AC adapter) and then inserting the USB cable actually turned my computer on...weird. Does anyone know why this USB 3.0 hub won't let my computer boot normally? Can anyone recommend a USB 3.0 hub that can be left plugged in and doesn't have any boot or Bluetooth issues? I couldn't find a BIOS setting that might be the culprit.

There appears to be a BIOS bug with the latest BIOS (1.34 for my 4318 CTO W510). After the above failed attempt to hook up a USB 3.0 Hub I tried a different brand (Monoprice) and had exactly the same result. You can't have a hub (with AC Adapter attached or not) to my laptop without it disabling Bluetooth at bootup (the radio is unavailable in Windows until you unplug the hub, restart the computer, and reenable with Function F5). I've elevated the issue to Lenovo and hopefully they'll have a BIOS update...it isn't a driver issue (I don't think) as the Bluetooth gets disabled prior to Windows booting. Has anyone else successfully been able to get a USB 3.0 hub to work, while mainting Bluetooth? By work...I mean not having to plug and unplug everytime...you should be able to leave it plugged in, turn off the computer, turn on the computer, and everything still work. Frustrating.

Good USB 3.0 hub to work with rMBP?

Can anyone recommend a good functioning and durable USB 3.0 hub that will work with my last year 15" rMBP? I am running OSX 10.9.
I may also try to sometimes use it with my Haswell MBA. I want to plug two or three HDD's into the hub. I also want to plug my Dell 27" U2713 USB 3.0 hub into this new hub (as a hub chain). It is really confusing trying to get a good one since there are so many to choose from... Thanks!

It is really confusing trying to get a good one since there are so many to choose from... Thanks!
Read the reviews for each one you are interested in. This should help you narrow it down.

Where do I get the AC to DC Power Adapter for a Linksys "Compact USB 4-Port Hub [USBHUB4C]

I have two Compact USB 4-Port Hubs, Model Number USBHUB4C. These Hubs can be powered, but I cannot find any information on External Power Adapters for these Hubs in any of the documentation or on the Linksys Web Site.
I need to know if Linksys has such Power Adapters available, and if so what the Model Numbers are, and how or where to purchase them.
If I will need a third party Power Adapter, I need to know what the Output Voltage & Current requirements are, and I also need to know the Polarity of the of the two Jack Contacts. [i.e. Is the center pin on the Hub's Jack Positive or Negative?] If possible I'd like to have a recommended Brand and Model Number for the Power Adapter.
Thanks In Advance,
Bruce

Friday, August 28, 2009, 0302 PDT
Hi, again,
Boy, am I glad I was able to find an answer to my problem in here. I find this very interesting. Here it is, almost 3 years after I made the original post, that I need to find the Power information, for this Device, again, but because of a Computer Crash, I could not get to the original notes, I made about this Forum Entry, so I began the search, again.
I find this very interesting. Here it is, almost 3 years after I made the original post, that I need to find the Power information, for this Device, again, but because of a Computer Crash, I could not get to the original notes, I made about this Forum Entry, so I began the search, again.
I have myriad AC/DC Converters, some of which are Voltage Selectable, but since the Power Specifications aren't on the HUB, or in the PDF Documentation, as is the case with most other Products, I came back to LinkSys/Cisco. As soon as I entered the Model Number of the "Compact USB 4-Port HUBs, Model Number USBHUB4C," for a search, this Forum entry came up on the page, and it appears there haven't been any queries, on any other subject, about this Device, in the interim.
Since the entry has been Viewed 2,484 times, hasn't it dawned on someone that it might be a good idea to carry a Power Product, that is compatible with this HUB, or at least provide a Specific Source, with a Model Number, (for instance, a Radio Shack SKU) so we don't need to hunt for one, over, and over. Why the information was never included in the package with the HUB, beats me. (It should have been on the Device, itself.)
Anyone who knows anything about USB Devices, knows that many of them cannot be powered from the USB Ports on a Computer, especially, on Laptops. Since one of the things mentioned in the Specifications is the fact that you can have "Max. Devices 127 (Daisy-chaining Hubs Together)," it would seem to be obvious that Power Information would be necessary. Since the "Daisy Chain" number is true, it should be obvious, that the "Chain" would require quite a few AC/DC Adapters to power it, adequately.
When this Device was Designed, the requirement for External Power must have been known, or there would never have been a Power Connector built into the Device. I've been in electronics for about 50 years, now, and I know that presently, it's a rarity that the Power Requirements aren't shown on the Device itself, with a Symbol depicting the Polarity of both the Inner, and Outer Conductors. Even Toys have that information shown on them.
I love these HUBs, but LinkSys/Cisco has really dropped the ball on this one. I'm guessing that a lot of people have discovered, that if this 4-Port USB HUB doesn't have External Power, they quickly decided not purchase another one, when they need to "Daisy Chain" them together, for their Network of USB Devices.
When you consider the loss of HUB Sales, coupled with a loss of income from a Power Supply they've never stocked, the numbers could be quite large. That's not even considering the Support time I'm guessing would have been necessary when Customers determined they had a problem, and needed answers. (It's not really a guess, since I talked to several Support People, without getting a satisfactory answer, before I finally came to this Forum, as a last resort.)
I was actually shocked to find that LinkSys/Cisco, didn't sell an AC/DC Power Supply for the HUB, because Power Supplies like that are so commonly required, with the Electronics sold, today. I'd be willing to wager that LinkSys/Cisco does, in fact, carry an AC/DC Power Supply that would be compatible with the "Compact USB 4-Port HUBs, Model Number USBHUB4C," they sell. When something like this happens, I wonder how many other Opportunities like this, have been missed by the people who work for this company.
We've all heard the expression about "Being too close to the Forest, to see the Trees." This may be a good example of it's meaning. At least I was able to find the answer to my Problem, thanks to the fact that the Query I made almost, 3 years ago, which had an answer, was still available to me, thanks to this Forum.
Very Interesting!
Bruce Feezel
Comedian62

What's a good USB 3.0 hub?

I've got a late 2012 Mac mini. Mavericks OS (10.9.4). I have lots of USB devices, most of them of the 2.0 variety, a couple 3.0. I bought an inexpensive "USB 3.0" hub, and it causes the Mac not to wake from sleep mode. Instead it just powers off, and I have to unplug it from the wall before it will reboot. So I've gone back to my old 2.0 hub for the majority of my gear, but I've got a couple of drives that want 3.0 connections to function efficiently.
From what I can tell, it's the mixing of USB 2.0 and 3.0 that is causing problems. I'm not sure if the ports on the mini are paralleled, or are on separate power and driver chips. But so far, I can keep 3.0 devices plugged into the computer and 2.0 into my hub. That's fine 'til I need to plug in a 3.0 flash drive. I cannot make it work with the two hubs - I still have the same "no wake up" issue, unless nothing is plugged into the 3.0 hub. SO...
Who makes a robust USB 3.0 hub? The Belkin sold at the Apple website has roundly terrible reviews. I'd rather not be a guinea pig again. Does anyone have serious experience with these? It's not enough that you have one and it works. I'd like to know that you understand the workings a bit better than I do, and maybe can even explain to me what might be causing this incompatibility.
Thanks.

Re: Is there a USB 3.0 Hub that really works with the Mac Mini?

USB 2.0 Hubs hooked to iMac G5 can't seem to sustain devices ...

about a month ago I noticed that my iPod and iPhone would occasionally disappear from my Device list in iTunes while plugged in. Both were connected to my computer via USB slots on my NewerTech miniStack v2. I plugged various devices into the USB slots on the Newertech and found that they would fail as well (such as, Turbo.264, iRocks 2.0 USB hub). I then tried plugging the devices directly into the back of my iMac G5 (except the iRocks hub) and they seemed to work fine. I believed I had determined (or so I thought) that the miniStack was failing me (curiously enough, the firewire still worked on the miniStack).
Well I have since unplugged all USB devices from the miniStackand and am using the plain jane iRocks USB 2.0 hub. Unfortunately, as was the case when devices were plugged into the miniStack, devices have started to go missing (unmount, fail, whatever you want to call it). It is important to note that the devices never fail when plugged directly into the back of the iMac G5 (with the exception of the Turbo.264 which has once "failed" when directly plugged into the back of the iMac).
Just last night, when I plugged my iPod 5.5 80gig into the iRocks USB Hub to syn, iTunes told me the file system was corrupt and that I would have to restore the iPod. When I attempted to do so, iTunes gave the the following message: Unable to restore iPod, unknown error occured. Error 1418. I plugged the iPod into the back of the computer and, wouldn't you know, the file system was "no longer corrupt."
Am I looking at a rather large problem with my iMac or have I run across the incredible coincidence of having two USB hubs fail at similar times? Any help would be greatly appreciated.
oh, and the important info:
Hardware Overview:
OS X 10.5.6
Model Name: iMac G5
Model Identifier: PowerMac12,1
Processor Name: PowerPC G5 (3.1)
Processor Speed: 2.1 GHz
Number Of CPUs: 1
L2 Cache (per CPU): 512 KB
Memory: 2.5 GB
Bus Speed: 700 MHz
Boot ROM Version: 5.2.6f1
USB Bus:
Host Controller Location: Built In USB
Host Controller Driver: AppleUSBOHCI
PCI Device ID: 0x0035
PCI Revision ID: 0x0043
PCI Vendor ID: 0x1033
Bus Number: 0x0b
USB High-Speed Bus:
Host Controller Location: Built In USB
Host Controller Driver: AppleUSBEHCI
PCI Device ID: 0x00e0
PCI Revision ID: 0x0004
PCI Vendor ID: 0x1033
Bus Number: 0x4b
USB2.0 Hub:
Product ID: 0x0606
Vendor ID: 0x05e3 (Genesys Logic, Inc.)
Version: 7.02
Speed: Up to 480 Mb/sec
Location ID: 0x4b100000
Current Available (mA): 500
Current Required (mA): 100
USB2.0 Hub Controller:
Product ID: 0x0058
Vendor ID: 0x0409 (NEC Corporation)
Version: 1.00
Speed: Up to 480 Mb/sec
Manufacturer: NEC Corporation
Location ID: 0x4b140000
Current Available (mA): 500
Current Required (mA): 100

Miriam,
Thank you for your many responses. I have checked the outlet in so much as I checked other devices (stereos, tvs, etc.) and they seem to work fine. Yes, a power strip is used but again, and maybe I don't understand the difference in how USB uses power and Firewire uses power, but the miniStack uses both USB and Firewire connections. When set strictly to Firewire for the hard drive data transfer, the hard drives never "unmount" or dissapear; this seems to be solely a USB problem.
Now, outside of trying other devices, do you know any other way to test the outlet? I am at a loss but I guess I am grateful that no one has suggested that my iMac is dying lol.
Cheers

Will the iMac support a usb 3.0 hub

I would like to get a 4 + port hub and thought I'd go ahead anf get the USB 3.0 but I'm not sure my MAC can handle it. I have all 2.0 devices now but am thinking about the future. I have the iMAC Quad Core i7.

Apple currently doesn't support USB 3.0 so there is no advantage to getting a USB 3.0 hub. However the hub should work but at 2.0 speeds.

USB 3.0 Hub for my iMac

Good Day!
Just obtained a Belkin 4 port Hub model : F4U073 purchased through MacStore online.
http://store.apple.com/us/product/HD988ZM/A/belkin-4-port-usb-30-powered-hub?fno de=58
My main purpose was to connect my SuperDrive to it but it doesn't connect.
A message comes up on my iMac monitor indicating that the SuperDrive USB Apple needs to be connected to a Mac's USB port.
3 Questions :
Why is this? Any idea?
Is it worth the purchase or investment if I connect other USB cables to the USB Hub and attach the SuperDrive to the iMac's USB port?
Do I need to use the Power Supply for it to work on my iMac? (It seems to work without it.)
Do I need to use the Power Supply for it to work on a MacBook? (Haven't tried it yet)
Cheers for the New Year!
It will be going down to -20° C or -6° F tonight.
Keeping warm...

SMC Reset:
Shut down the iMac
Unplug the iMac's power cord.
Wait fifteen seconds.
Attach the iMac's power cord.
Wait five seconds, then press the power button to turn on the iMac.
The SuperDrive device must be plugged directly into your iMac.
A SuperDrive device connected to a hub will not have access to extra power above the standard USB specification of the port the device is connecting to
(500 mA for USB 2, and 900 mA for USB 3).
The USB port providing extra power is determined by the SuperDrive device that requires power beyond 500 mA for USB 2, or 900 mA for USB 3. The remaining ports will continue to offer their normal maximum output. Some Apple Macs may offer the ability to operate more than one USB port at 1100 mA at 5 V. On those computers, the second port is enabled when an appropriate device is connected.

USB 3.0 Hub won't work in 3.0 mode

I have a Portege Z835-P372 and my USB 3.0 Hub (StarTech 2 port hub) won't work in 3.0 mode.
When I purchased the StarTech.com hub, it came with no instructions or CD (with drivers, etc). Their website also has no driversor firmware updates for the hub (As I understand, the hub itself doesn't need any drivers).
When I connected it to my computer the first time it installed it as a Renesas Electronics 2.0 hub. It thus always works only in 2.0 mode.
As I understand I probably need the latest NEC/Renesas drivers and firmware updates, these I have downloaded from the Toshiba driver site, but still no luck.
I did some research and found that the drivers on the Toshiba site are old and there are newer ones out there (but from other sites that I had to register and pay for). Are they available elsewhere?
I did some more research into similar problems people are having out there and there were comments that the Intel USB 3.0 Driver also has to be updated.
Any suggestions?

hey RagingPigeon,
try uninstalling all USB control drivers from your unit and then install this :
http://support.lenovo.com/en_US/downloads/detail.page?DocID=DS015025
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USB 3.0 hub seen as USB 2.0

I have a Mac Mini, late 2012 model running the latest Mavericks. I plugged a D-Link DUB-1340 4-port USB 3.0 SuperSpeed hub. When I look at System Report on my Mac, it shows that hub as a USB 2.0 hub. Why doesn't my Mac Mini see this as a USB 3.0 hub? Is there something I need to change on my Mac or the hub for it to be correctly recognized? It is plugged into the Mac Mini using the supplied USB 3.0 cable (has the double-connector on the hub-side) and I have plugged it into an AC outlet. When I plug my iPad into the hub it always tells me it is not charging, but if I plug my iPad directly into the Mac Mini it does charge.

Have you tried different ports on the Mac Mini?
Try a different Cable.
Confirm that the unit is being powered, the ports will only supply 100ma when unpowered.
Have you anything else plugged into the Hub, if so test the items one at a time.
Have you contacted D-Link support for advice?

A Brand New usb 3.0 Hub not recongized

I have a New 15inch Retina MacBook Pro. The USB3.0 ports recongize all 2.0 devices.... and a USB 3.0 Passport.... But Not a USB 3.0 HUb nor brand new 3.0 to Gigabit ethernet. All updates are current.

I spent a couple of days trying to figure out who the manufacturer was. The hub itself has no identification on it to indicate the manufacturer; came without any documentation; no box; no manufacturer info from the seller. The seller has thus far been helpful and says that I am the first person to have had a problem with it.
I just tracked down what may be the manufacturer. Here's the page with the port: http://vina.manufacturer.globalsources.com/si/6008822920529/pdtl/USB-hub/1003936 496/USB-2.0-Hub.htm
I may contact them but my Chinese is not very good.
On the other hand, it was very cheap. Less than 6 bucks, including shipping. I may use it as a paperweight.

USB 3.0 Hub attached to a Mac Mini does not work

I have already 2 USB 2.0 hubs attached and work perfectly. I want to add a 3.0 USB powered hub but it does not work. The USB is a Iogear 3.0 USB Hub.
Thank you

Does any USB thing show up?
Of not...
USB reset...
If your Firewire or USB isn't recognizing any device. A solution which has worked for some whose hard drive became invisible in 10.4 was simply to follow these four steps to reset the Firewire/USB bus:
1. Shut the machine down.
2. UNPLUG the power lead to the computer and any firewire/USB drive or devices.
3. leave it for 10 minutes.
4. Connect back up and reboot.
http://www.macmaps.com/firewirebug2.html

USB 3.0 hub recommendation?

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