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Fixed in 2018.1.X

Fixed in 5.6.X, 2017.1.X, 2017.2.X, 2017.3.X

Won't Fix in 5.5.X



Found in


Issue ID




[macOS][High Sierra] MonoDevelop crashes on 2nd monitor



MonoDevelop crashes on start when last placed on 2nd monitor with MacOS 10.13 High Sierra.

It will run properly as long as it's closed while on the 1st monitor. "Displays have separate spaces" option in Mission Control settings has no effect, MonoDevelop will crash with either setting, if it's on 2nd monitor when closed.

If you run it on 1st monitor, move it 2nd monitor to work and then move back to 1st before closing it will run properly.

1. On macOS10.13 Run MonoDevelop, by default, it should run on the 1st (main monitor)
2. While open, move it to 2nd monitor
3. Close MonoDevelop
4. Run MonoDevelop,
Result: MonoDevelop crashes

Reproduced with: 2017.3.0b3, 2017.2.0f2, 2017.1.1p3, 5.6.3p4 and all earlier versions.

A) delete MonoDevelop settings folder (MonoDevelop-Unity-5.0) in Preferences.
B) have only one (main) monitor and run MonoDevelop

Make sure you update to the newest version of MonoDevelop using Unity Installer and set External Script Editor to MonoDevelop (built-in).

Comments (11)

  1. andersemil

    Jan 11, 2018 12:06

    Fixed in 2017.2.0p1

  2. farshidhss

    Oct 22, 2017 12:54

    yes please fix this! This is killing all my environment.

  3. farshidhss

    Oct 22, 2017 12:54

    yes please fix this! This is killing all my environment.

  4. magonicolas

    Oct 20, 2017 20:01

    @KWOLF002 what patch are you referring?

  5. kwolf002

    Oct 20, 2017 13:13

    The patch fixed it for me

  6. magonicolas

    Oct 17, 2017 23:41

    Same here, it crashes with one or 2 screen, I cant open it!

  7. Humzah2

    Oct 17, 2017 04:23

    still happening

  8. Johnsdoms

    Oct 13, 2017 16:08

    Same for me, does not even open on High Sierra without second monitor or anything.

  9. twestberg

    Oct 13, 2017 15:12

    On an iMac running High Sierra (Mac OS 10.13), Unity 2017.2.0f3 Personal, a simple project (following Roll a Ball tutorial) crashes MonoDevelop when a second monitor is attached.
    Disconnecting the second monitor lets monodevelop run normally.

  10. ssuelves

    Oct 10, 2017 20:59

    with only one monitor fails. I never have 2 monitors and fails. I'm using unity 5.6.3p4

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