Sleep Wake failure in EFI Failure code:: 0xffffffff 0x0000001f Please IGNORE the below stackshot ================================================================ Date/Time: 2020-02-21 06:20:40 -0800 OS Version: ??? ??? (Build ???) Architecture: x86_64 Report Version: 29 Data Source: Stackshots Shared Cache: 0x45ec000 54C09F14-B993-3ACD-8E8C-F25A0F40338F Event: Sleep Wake Failure Duration: 0.00s Steps: 1 Boot args: agdpmod=pikera alcid=1 -v Time Awake Since Boot: 18s Process: swd [278] Architecture: x86_64 Footprint: 420 KB Start time: 2020-02-21 06:20:40 -0800 End time: 2020-02-21 06:20:40 -0800 Num samples: 1 (1) Thread 0x755 1 sample (1) priority 4 (base 4) 1 start + 1 (libdyld.dylib + 108541) [0x7fff676b87fd] 1 1 ??? [0x1010dc454] 1 1 ??? [0x1010dc1dd] 1 1 __stack_snapshot_with_config + 10 (libsystem_kernel.dylib + 136138) [0x7fff678193ca] 1 *1 ??? [0xffffff80002e3206] 1 *1 ??? [0xffffff800099b08a] 1 *1 ??? [0xffffff80008b3f91] 1 *1 ??? [0xffffff800030646a] (running) 1 Binary Images: 0x7fff6769e000 - 0x7fff676d3fff libdyld.dylib (733.8) <8B0DFE8A-42CF-32C8-B121-83C22BF25F69> /usr/lib/system/libdyld.dylib 0x7fff677f8000 - 0x7fff67824fff libsystem_kernel.dylib (6153.81.5) <23909F45-79C3-34C9-A28F-337915925E5E> /usr/lib/system/libsystem_kernel.dylib Model: iMac15,1, BootROM 231.0.0.0.0, 2 processors, Dual-Core Intel Core i3, 3,6 GHz, 8 GB, SMC 2.22f16 Graphics: Intel HD Graphics 4400, Intel HD Graphics 4400, spdisplays_builtin Memory Module: CHA 3/DIMM A3, 4 GB, DDR3, 1600 MHz, 0420, F3-12800CL9-4GBRL Memory Module: CHB 4/DIMM B4, 4 GB, DDR3, 1600 MHz, 0420, F3-12800CL9-4GBRL Serial ATA Device: WDC WDS120G1G0A-00SS50, 120,03 GB Serial ATA Device: unknown USB Device: USB 2.0 Bus USB Device: Hub USB Device: USB 2.0 Bus USB Device: Hub USB Device: USB 3.0 Bus USB Device: Cruzer Blade USB Device: SpaceSaver M Kbrd v3_47 USB Device: Composite Device Thunderbolt Bus: