updated my new mac pro 3.5 GHz 6-core intel xeon E5 to mac OS 10.9.2 today.
all periphals (standalone hubs, hubs in monitors, harddisks) are now recognised not as is (USB 2.0) but as USB 1.0 (ie transfer rate 12 Mbit/s), no matter whether they are plugged into a port of the mac pro directly or thru a hub. i do not get anything done anymore!
any advice how to get back to USB 2.0?
thank you!
The warranty entitles you to complimentary phone support for the first 90 days of ownership.
If you bought the product in the U.S. directly from Apple (not from a reseller), you have 14 days from the date of delivery in which to exchange or return it for a refund. In other countries, the return policy may be different. If you bought from a reseller, its return policy applies.
hi linc,
thanks for the idea.
apple support suggested to reset SMC and PRAM. neither did cure the problem. :-(
See the rest of my comment.
update:
apple support suggested to reinstall system over existing system. after, they suggested to do a clean system install on a new partition. in both cases the problem remained.
since USB worked on 10.9.1 it should not be a hardware issue. since my USB does not work even on a clean install of 10.9.2 (which seems to be fine with the rest of the world), it should not be a software issue of my system.
my guess is a fawlty firmware update which was included in the install and which addresses a USB problem (which i did not have - but now i have one)...
Return it then (if you are still within the return period windows)
mac pro has been to the dealer's workshop for checking. result: hardware fine, software fine. firmware issue. but right now, there is no new firmware available. neither is a downgrade possible. so i will have to wait... :-(((
just to finish this up: it was two usb-hubs that obviously are not compatible any more. taking them out of the setup resolved the problem.
strange - these hubs did work perfectly for years with my old mac pro. all of a sudden they are not compatible any longer. did the usb 2.0 specs change? ;-)
anyway, fits in the picture with the new mac pro. everything not thunderbolt will get you in trouble... :-(
So there's nothing wrong with the Mac then?
i leave the answer to you: things that have worked perfectly for years with an older mac pro (ie have perfectly complied with the usb protocol used) are suddenly not compatible. i personally would not apply the term 'nothing wrong' to this.
You could have answered, I have no wish to play silly games with words, with you.
Bye.
sorry to make you angry. not intended at all.
the unit is not defect. it just does not work as expected and the way other units did.
new mac pro recognises usb 2.0 as 1.0 - super slow data transfer!
