macOS 13.3 - USB devices become unusable after a few hours
Hi there. After updating to macOS 13.3 I've had some weird issues with USB devices becoming unusable unless I reboot my iMac. This starts happening after a few hours of display sleep. It's possible this could still happen without display sleep, but I haven't tried leaving the iMac idle with the display on.
Observations
- All USB devices are no longer usable (MIDI keyboard, Wacom tablet, Focusrite audio interface, external hard drives)
- At no time are any processes shown as not responding in Activity Monitor
- It doesn't happen immediately and it seems to happen after the display has been asleep for several hours (usually overnight) - I have "Prevent automatic sleeping when the display is off" turned on
- I usually notice this is happening when my Wacom tablet becomes unusable, and disconnecting/reconnecting has no effect - it also isn't usable over Bluetooth
- Connecting a Magic Mouse over Bluetooth works fine
Once this starts happening, other weird things happen as well.
- Logging out/rebooting results in a hang, though the cursor is still movable
- Rebooting must be done with a forced reboot using the power button
- Quitting an app could result in the app freezing
- Opening an app could result in the app freezing before fully launching
Things I've tried
- Recovery mode First Aid on the startup disk SSD (no problems found)
- Disconnecting external hard drives (HDDs) to check if it's a failing external drive causing problems (no effect) - the two external drives are not showing any problems in general but they are around 5 years old. The drives are currently still disconnected and have been so for a day as of writing this.
Connected devices (iMac 27 inch 2020)
- Two external HDDs connected directly to the iMac's USB ports
- Apple Watch charger connected to a USB-C port
- USB-A hub connected to a USB-C port (4 port, Keymox brand)
- Wacom tablet connected to the USB hub
- Focusrite audio interface connected to the USB hub
- MIDI keyboard connected to the USB hub
- I've had all of these devices for 2 or more years without problems
Any ideas as to what might be happening? Any other info I can provide? I'll be contacting Apple Support this week as well, as I do have AppleCare coverage remaining.
iMac 27″