USB Port Not Working

Every since I upgraded to OS MAC Catalina (Dec 2019) I can no longer find or access my usb ports when I plug my SD card or External HD or iPhone into my iMac. So now I have tons of music and photos that I can no longer transfer between devices! Ughh very frustrating. Please help!!!

Posted on Dec 29, 2019 7:12 AM

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2 replies

dialabrain

Level 10

135,167 points

Dec 29, 2019 7:22 AM in response to MoRobi

Try resetting the SMC.

How to reset the System Management Controller (SMC) on your Mac - Apple Support

BDAqua

Level 10

250,247 points

Dec 29, 2019 8:38 AM in response to MoRobi

If your Firewire or USB isn't recognizing any device. A solution is to 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

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USB Port Not Working

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