0.100 2017-12-13 21:39:02; Factorio 0.15.40 (build 30950, mac, steam)
   0.100 Operating system: Mac OS X 10.9.5
   0.100 Program arguments: "/Users/Bilters/Library/Application Support/Steam/steamapps/common/Factorio/factorio.app" 
   0.100 Read data path: /Users/Bilters/Library/Application Support/Steam/steamapps/common/Factorio/factorio.app/Contents/data
   0.100 Write data path: /Users/Bilters/Library/Application Support/factorio
   0.100 Binaries path: /Users/Bilters/Library/Application Support/Steam/steamapps/common
   0.132 System info: [CPU: Intel(R) Core(TM)2 Duo CPU     T9600  @ 2.80GHz, 2 cores, RAM: 4096MB]
   0.226 Display options: [FullScreen: 0] [VSync: 1] [UIScale: 100%] [MultiSampling: OFF] [Screen: 255] [Lang: en]
   0.226 Available display adapters: 1
   0.226  [0]: resolution 1440x900px at [0,0]
   0.226 Create display on adapter 0. Size 1280x720 at position [70, 72].
   2.682 Initialised OpenGL:[0] NVIDIA GeForce 9600M GT OpenGL Engine; driver: 2.1 NVIDIA-8.24.17 310.90.9.05f01
   6.019 Total system memory is low (4096 MB). Setting graphics preset to MacWithLowRAM.
   6.019 Graphics options: [Graphics quality: normal] [Video memory usage: medium] [Light scale: 25%] [DXT: false] [Shader: 1]
  10.048 Loading mod core 0.0.0 (data.lua)
  10.209 Loading mod base 0.15.40 (data.lua)
  10.910 Loading mod base 0.15.40 (data-updates.lua)
  11.036 Checksum for core: 3865022077
  11.036 Checksum of base: 1503927233
  13.047 Info PlayerData.cpp:60: Local player-data.json unavailable
  13.047 Info PlayerData.cpp:63: Cloud player-data.json available, timestamp 1513019873
  14.032 Loaded shader file /Users/Bilters/Library/Application Support/Steam/steamapps/common/Factorio/factorio.app/Contents/data/core/graphics/shaders/game.glsl
  14.159 Loaded shader file /Users/Bilters/Library/Application Support/Steam/steamapps/common/Factorio/factorio.app/Contents/data/core/graphics/shaders/zoom-to-world.glsl
  14.188 Initial atlas bitmap size is 4096
  14.191 Created atlas bitmap 4096x4094
  14.192 Created atlas bitmap 4096x1727
  14.193 Created atlas bitmap 4096x4063
  14.193 Created atlas bitmap 4096x196
  14.194 Created atlas bitmap 4096x1847
  14.194 Created atlas bitmap 4096x1374
  14.194 Created atlas bitmap 4096x1868
 129.984 Sprites loaded
 130.142 Convert atlas 4096x1868 to: trilinear-filtering 
 130.576 Loading sounds...
 136.404 Custom inputs active: 0
 136.828 Error CrashHandler.cpp:387: Received SIGSEGV
Factorio crashed. Generating symbolized stacktrace, please wait ...
#0  0x0000000100988302 in 0x0000000100988302 (in factorio)
#1  0x00000001009778bf in 0x00000001009778bf (in factorio)
#2  0x0000000100977850 in 0x0000000100977850 (in factorio)
#3  0x00007fff8249a5aa in 0x00007fff8249a5aa
#4  0x0000000000000a00 in 0x00000a00 (in factorio)
#5  0x00007fff68b9d369 in 0x00007fff68b9d369
#6  0x00007fff68b9edf6 in 0x00007fff68b9edf6
#7  0x00007fff817be2dd in 0x00007fff817be2dd
#8  0x00000001013ed030 in 0x00000001013ed030 (in factorio)
#9  0x0000000100169d1a in 0x0000000100169d1a (in factorio)
#10 0x000000010039616a in 0x000000010039616a (in factorio)
#11 0x0000000100391c56 in 0x0000000100391c56 (in factorio)
#12 0x0000000100714c82 in 0x0000000100714c82 (in factorio)
#13 0x000000010070f1a0 in 0x000000010070f1a0 (in factorio)
#14 0x0000000100e1c867 in 0x0000000100e1c867 (in factorio)
#15 0x00007fff85503d8b in 0x00007fff85503d8b
#16 0x00007fff80ac1899 in 0x00007fff80ac1899
#17 0x00007fff80ac172a in 0x00007fff80ac172a
#18 0x00007fff80ac5fc9 in 0x00007fff80ac5fc9
 139.126 Error Util.cpp:80: Unexpected error occurred. If you're running the latest version of the game you can help us solve the problem by posting the contents of the log file on the Factorio forums.
Please also include the save file(s), any mods you may be using, and any steps you know of to reproduce the crash.