I just got done filing another bug report with Apple, about the power maximums, which might explain this. I did some tests on the maximum current draw by hooking up a current meter and increasing the draw until the power warning pops up. Interesting it pops up at about 150ma, which is higher than expected (it's 100ma according to Apple).Don wrote:I had the same problem of not being able to use the Blue Yeti with the current OS. However, when I insert the Belkin 4 port USB desk hub into the chain, everything works fine, EVEN WITHOUT PLUGGING THE POWER ADAPTER INTO THE DESK HUB. Huh?
So the behavior in 4.2.1 can be explained by this power surge (which happens when plugging in a device), and this sudden spike is above the threshold and trigger the warning. The USB hub in this case is probably acting as a power "buffer" and reducing the spike, so this is further evidence to this theory.
It's good to know that we might be able to get portable again with the Yeti. But for how long is anyones guess (Apple has said that devices should not draw ANY power from the USB port, which seems a bit impossible for some devices like card readers or even flash drives)