X-Plane 11 crash at start-up via Steam

Question

What more can I say:

Crash at first splash screen. logs below. latest Steam version. Now what?

X Plane steam system info, and I've also got the Mac crash log (cant post because to many characters.

Computer Information:

    Manufacturer:  Apple

    Model:  iMac13,2

    Form Factor: Desktop

    No Touch Input Detected

Processor Information:

    CPU Vendor:  GenuineIntel

    CPU Brand:          Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz

    CPU Family:  0x6

    CPU Model:  0x3a

    CPU Stepping:  0x9

    CPU Type:  0x0

    Speed:  3400 Mhz

    8 logical processors

    4 physical processors

    HyperThreading:  Supported

    FCMOV:  Supported

    SSE2:  Supported

    SSE3:  Supported

    SSSE3:  Supported

    SSE4a:  Unsupported

    SSE41:  Supported

    SSE42:  Supported

    AES:  Supported

    AVX:  Supported

    CMPXCHG16B:  Supported

    LAHF/SAHF:  Supported

    PrefetchW:  Unsupported

Operating System Version:

    MacOS 10.13.3 (64 bit)

Video Card:

    Driver:  NVIDIA GeForce GTX 680MX

    Driver Version:  1.2

    Driver Date: 0 0 0

    OpenGL Version: 2.1

    Desktop Color Depth: 32 bits per pixel

    Monitor Refresh Rate: 0 Hz

    VendorID:  0x10de

    DeviceID:  0x11a3

    Revision:  0xa2

    Number of Monitors:  2

    Number of Logical Video Cards:  1

    Primary Display Resolution:  2560 x 1440

    Desktop Resolution: 5120 x 2880

    Primary Display Size: 23.46" x 13.19" (26.89" diag)

                                            59.6cm x 33.5cm (68.3cm diag)

    Primary VRAM: 0 MB

Memory:

    RAM:  16384 Mb

Miscellaneous:

    UI Language:  English

    Media Type:  DVD

    Total Hard Disk Space Available:  26421944 Mb

    Largest Free Hard Disk Block:  2659202 Mb

    VR Headset: None detected

Answer 1

Use the icon that looks like a landscape picture to attach full files. The Apple crash report will probably be the most helpful. You can find them  in ~/Library/Logs/DiagnosticReports/ (where ~ refers to your Home directory, & some folders may be hidden by default).

Otherwise, a good place to look is at the preferences. Move the preferences folder (found in the Output folder) to the desktop, then restart X‑Plane and default preferences will be restored. If the default preferences do not fix your problem, you can simply replace them with the folder you moved to the desktop and restore your personalized settings.

The final common culprit is third party add ons, such as scenery and plugins. Try moving the Custom Scenery folder and plugins folder (found in the Resources folder) to the desktop, then restart X-Plane.