https://bugs.kde.org/show_bug.cgi?id=377199

            Bug ID: 377199
           Summary: Cannot open multiple versions of Krita simultaneously
           Product: krita
           Version: 3.1.2
          Platform: Mac OS X Disk Images
                OS: OS X
            Status: UNCONFIRMED
          Severity: minor
          Priority: NOR
         Component: general
          Assignee: krita-bugs-n...@kde.org
          Reporter: michi.schw...@gmail.com
  Target Milestone: ---

I can't open multiple copies/versions of Krita at the same time, at least on OS
X 10.11.6. This makes testing for regressions and comparing the behaviour with
an older version very inconvenient.

Let's say I open Krita 3.1.2 and then double-click on Krita 3.1.1. The icon
briefly appears in the dock and then disappears again. Launching the binary
from the command line produces the following output:

    $ /Applications/Krita\ 3.1.1.app/Contents/MacOS/krita 
    QCoreApplication::arguments: Please instantiate the QApplication object
first
    krita.lib.pigment: Compiled for arch: 4
    krita.lib.pigment: Features supported:
    krita.lib.pigment:   "SSE2"         ---      yes
    krita.lib.pigment:   "SSSE3"        ---      yes
    krita.lib.pigment:   "SSE4.1"       ---      yes
    krita.lib.pigment:   "AVX "         ---      no
    krita.lib.pigment:   "AVX2 "        ---      no
    No "breeze" available.
    Set style "fusion"
    OpenGL Info
      Vendor:  ATI Technologies Inc.
      Renderer:  ATI Radeon HD 4850 OpenGL Engine
      Version:  3.3 ATI-10.0.51
      Shading language:  3.30
      Requested format:  QSurfaceFormat(version 3.2, options QFlags(),
depthBufferSize 24, redBufferSize -1, greenBufferSize -1, blueBufferSize -1,
alphaBufferSize -1, stencilBufferSize 8, samples -1, swapBehavior 2,
swapInterval 0, profile  1)
      Current format:    QSurfaceFormat(version 3.3, options QFlags(),
depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8,
alphaBufferSize -1, stencilBufferSize 8, samples -1, swapBehavior 2,
swapInterval 1, profile  1)
         Version: 3 . 3
         Supports deprecated functions false
    krita has opengl true
    Setting XDG_DATA_DIRS "/Applications/Krita 3.1.1.app/Contents/share"
    Available translations QSet("en_US")
    Available domain translations QSet("en_US")
    Override language: ""

Comparing this to other applications on OS X/macOS, I would have assumed this
to just work. If there is some deeper, hard to fix problem preventing this
use-case from working, I would suggest that the second instance of Krita should
at least display a dialog explaining why this does now work.

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