更新AppleALC后，显示出现问题（求助）

黄增光

2018-08-20 19:49:12 +0800 : Showing all currently held IOKit power assertions
Assertion status system-wide:
   BackgroundTask                 0
   ApplePushServiceTask           0
   UserIsActive                   1
   PreventUserIdleDisplaySleep    0
   PreventSystemSleep             0
   ExternalMedia                  0
   PreventUserIdleSystemSleep     0
   NetworkClientActive            0
Listed by owning process:
   pid 105(hidd): [0x0000001b00098078] 00:00:00 UserIsActive named: "com.apple.iohideventsystem.queue.tickle.4294968968.17"
    Timeout will fire in 600 secs Action=TimeoutActionRelease
Kernel Assertions: 0x4=USB
   id=501  level=255 0x4=USB mod=1970/1/1 08:00 description=com.apple.usb.externaldevice.14a00000 owner=BRCM20702 Hub
   id=503  level=255 0x4=USB mod=1970/1/1 08:00 description=com.apple.usb.externaldevice.14200000 owner=2.4G Receiver
Idle sleep preventers: IODisplayWrangler

电源日志里提示这个不知道什么原因