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Hi Everyone,
I have a MACBOOK pro 2017 Big Sur 11.4
The apple cd reader works on my wife's MacBook Air, about 10 years old, and not mine. I get a message, 'usb accessory needs power'
Any ideas about what's going on?
MacBook Pro 15″, macOS 11.4
The Apple portable DVD reader requires 900 milliAmps power. Standard for USB-A ports is 500 milliAmps. Not all USB ports, adapters, and Docks can supply that much.
Best results are obtained from a port DIRECTLY on chassis, if possible.
menu > About this Mac > (System Report) > USB > the exact device...
... will show how much power it can get on that port, and how much it is demanding.
The Apple portable DVD reader requires 900 milliAmps power. Standard for USB-A ports is 500 milliAmps. Not all USB ports, adapters, and Docks can supply that much.
Best results are obtained from a port DIRECTLY on chassis, if possible.
menu > About this Mac > (System Report) > USB > the exact device...
... will show how much power it can get on that port, and how much it is demanding.
tonywoodphoto wrote:
Hi Everyone,
I have a MACBOOK pro 2017 Big Sur 11.4
The apple cd reader works on my wife's MacBook Air, about 10 years old, and not mine. I get a message, 'usb accessory needs power'
Any ideas about what's going on?
Not all old CD/DVD drives are compatible...
You can try a different cable connection
You can try a different port
Eliminate any hub connection and go direct
Thanks! Will do.
Ok thanks, very helpful! :-)
'usb accessory needs power'
