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터미널에서 아래 명령어 입력하여 해결하였습니다.
sudo pmset -a standby 0
Sleep Wake failure in EFI
Failure code:: 0xffffffff 0x0000001f
Please IGNORE the below stackshot
================================================================
Date/Time: 2019-12-21 03:00:37 +0900
OS Version: ??? ??? (Build ???)
Architecture: x86_64
Report Version: 29
Data Source: Stackshots
Shared Cache: 0x74b2000 D3AE5ACB-CF4D-3244-B802-0B4CEB0AA8C0
Event: Sleep Wake Failure
Duration: 0.00s
Steps: 1
Boot args: cwae=2 chunklist-security-epoch=0 -chunklist-no-rev2-dev
Time Awake Since Boot: 25s
Process: swd [636]
Architecture: x86_64
Footprint: 380 KB
Start time: 2019-12-21 03:00:37 +0900
End time: 2019-12-21 03:00:37 +0900
Num samples: 1 (1)
Thread 0xd57 1 sample (1) priority 4 (base 4)
<thread QoS background (requested background), thread darwinbg, process darwinbg, IO tier 2>
1 start + 1 (libdyld.dylib + 70373) [0x7fff6a30d2e5] 1
1 ??? [0x10b80e454] 1
1 ??? [0x10b80e1dd] 1
1 __stack_snapshot_with_config + 10 (libsystem_kernel.dylib + 135938) [0x7fff6a476302] 1
*1 ??? [0xffffff80002e1206] 1
*1 ??? [0xffffff800099a1aa] 1
*1 ??? [0xffffff80008b3211] 1
*1 ??? [0xffffff8000304387] (running) 1
Binary Images:
0x7fff6a2fc000 - 0x7fff6a331fff libdyld.dylib (733.6) <2FA4B359-624B-337C-9207-CDCF841C2E52> /usr/lib/system/libdyld.dylib
0x7fff6a455000 - 0x7fff6a481fff libsystem_kernel.dylib (6153.41.3) <18918E9C-45BC-3D5A-A6B6-3DBC60EEE2E1> /usr/lib/system/libsystem_kernel.dylib
https://www.reddit.com/r/MacOS/comments/dme38s/sleep_wake_failure_in_efi/