foster Posted June 11, 2015 Share Posted June 11, 2015 When Insert USB 3.0 drives they do not work, but USB 2.0 drives work just fine. Yosemite had no problems with usb 3.0 drives for me. Only using usb 3.0 ports 4 on M/B and 2 on top of case with USB 3.0 header on M/B Link to comment https://www.insanelymac.com/forum/topic/306586-usb-30-drives-not-recognized-by-os-x-1011/ Share on other sites More sharing options...
andrewq2 Posted June 11, 2015 Share Posted June 11, 2015 Read the release notes posted on the developer portal... It's a Dev-Beta for a reason. Even real Apple machines are having issues with USB. They are completely re-working the IO subsystem, or at least that's what it looks like to me AFAIK. The kernel extensions for the USB subsystem are clearly not production ready and just meant to be enough to get out to developer houses when I took a cursory look. https://developer.apple.com/library/prerelease/mac/releasenotes/General/rn-osx-10.11/index.html 1 Link to comment https://www.insanelymac.com/forum/topic/306586-usb-30-drives-not-recognized-by-os-x-1011/#findComment-2143745 Share on other sites More sharing options...
andrewq2 Posted June 11, 2015 Share Posted June 11, 2015 i see you have a gigabyte board you didn't change the echi xchi settings in the bios right that will make usb 3.0 to stop working also the same goes for usb 2.0 changing those setting can make only one of the to work depending in the combination you use in the bios you have to use the setting that makes both of them work i will say rest the bios to default then change everything you need to change back except the echi and xchi one last thing is your Yosemite a distro or did you downloaded yosemite from the app store and crete your own installer if you are using a Yosemite distro maybe the usb 3.0 drivers are already included in the image for Yosemite downloaded from the app store you have to add the driver yourself you need this file for usb 3.0 support http://www1.zippyshare.com/v/vcRmTr04/file.html i also have a gigabyte motherboard i haven't tried el capital yet my only doubt is that usb 3.0 should work in usb 2.0 just at lower speed do you those usb 3.0 formatted as ntfs and maybe that's why the system don't see the device plug the usb 3.0 and go to disk utility and see anyway good luck maybe apple did change something i will come back later As stated above, the USB subsystem is re-worked from scratch. Most Yosemite IO related kernel extensions and patches will not work. GenericUSBXHCI will cause a KP on El Capitan Link to comment https://www.insanelymac.com/forum/topic/306586-usb-30-drives-not-recognized-by-os-x-1011/#findComment-2143747 Share on other sites More sharing options...
foster Posted June 11, 2015 Author Share Posted June 11, 2015 Yosemite I created my own usb install per numerous guides For this install ran app and let clover boot into the installer like a Mac would. Link to comment https://www.insanelymac.com/forum/topic/306586-usb-30-drives-not-recognized-by-os-x-1011/#findComment-2143770 Share on other sites More sharing options...
codgician Posted June 13, 2015 Share Posted June 13, 2015 It's an announced system bug. Perhaps it will work by replacing the new driver with an old version from Yosemite (IOUSBFamily.kext and that kind of stuff). Haven't got time to try yet. Link to comment https://www.insanelymac.com/forum/topic/306586-usb-30-drives-not-recognized-by-os-x-1011/#findComment-2144504 Share on other sites More sharing options...
C.Frio Posted July 31, 2015 Share Posted July 31, 2015 Hi I installed Developer beta on external usb drive at usb 3.0 port.. it boot OK.. than update to Developer beta 2 from apple store and got "forbidden " icon.. then put on a non 3.0 port and it worked.... c.frio Link to comment https://www.insanelymac.com/forum/topic/306586-usb-30-drives-not-recognized-by-os-x-1011/#findComment-2156878 Share on other sites More sharing options...
TomHsiung Posted August 22, 2015 Share Posted August 22, 2015 Mine USB3.0 displayed abnormally. Device ID: 8086 8cb1 Link to comment https://www.insanelymac.com/forum/topic/306586-usb-30-drives-not-recognized-by-os-x-1011/#findComment-2162556 Share on other sites More sharing options...
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