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Openstudioapp 1.11.1 hangs at "Loading Library Files" after installation #898
Description
Issue overview
Openstudioapp 1.11.1 hangs at "Loading Library Files" after installation.
Current Behavior
Launching /Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app on MacOS 26.7.1 hangs at the following message:
The app UI never starts up as it never gets past this screen.
Executing from the Application folder with DEBUG set yields the following
`% OPENSTUDIO_APPLICATION_DEBUG=1 ./OpenStudioApp.app/Contents/MacOS/OpenStudioApp
[OpenStudioApp.main] <-2> main received argc=1 arguments
[OpenStudioApp.main] <-2> Argument 0=./OpenStudioApp.app/Contents/MacOS/OpenStudioApp
[openstudio.OSAppBase] <-2> Measures dir: /Users/sborman/OpenStudio/Measures
[OpenStudioApp] <-2> setDViewPath called with t_dviewPath = ''.
[OpenStudioApp] <-2> setDViewPath: m_dviewPath = ''.
[OpenStudioApp] <-2>
m_currLang=[en]
Debug: Trying to change language from ' "en" ' to ' "en" '. ((null):0, (null))
Debug: translationFolder= "/Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/translations" ((null):0, (null))
Debug: m_qtTranslator ok ((null):0, (null))
Debug: m_qtBaseTranslator ok ((null):0, (null))
Debug:
NO TRANSLATOR NEEDED for lang = "English"
((null):0, (null))
[OpenStudioApplicationPathHelpers] <-2> getOpenStudioApplicationPath, info.dli_fname = '/Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp'
[PathHelpers] <-2> completeAndNormalize: result = /Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp
[ApplicationPathHelpers] <-2> getOpenStudioApplicationPath, found '/Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp'
[OpenStudioApplicationPathHelpers] <-2> getOpenStudioApplicationPath, info.dli_fname = '/Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp'
[PathHelpers] <-2> completeAndNormalize: result = /Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp
[ApplicationPathHelpers] <-2> getOpenStudioApplicationPath, found '/Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp'
[OpenStudioApplicationPathHelpers] <-2> getOpenStudioApplicationModule, info.dli_fname = '/Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp'
[PathHelpers] <-2> completeAndNormalize: result = /Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp
[ApplicationPathHelpers] <-2> getOpenStudioApplicationModule, found '/Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp'
[OpenStudioApplicationPathHelpers] <-2> Searching for CLI in '/Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/openstudio'
[PathHelpers] <-2> completeAndNormalize: result = /Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/openstudio
[OpenStudioApplicationPathHelpers] <-2> Found CLI at '/Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/openstudio'
[PathHelpers] <-2> completeAndNormalize: result = /Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/openstudio
[openstudio.OSAppBase] <-2> Starting measure manager server at http://localhost:49936
[openstudio.OSAppBase] <-2> Command: /Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/openstudio measure -s 49936
[OpenStudioApplicationPathHelpers] <-2> getOpenStudioApplicationPath, info.dli_fname = '/Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp'
[PathHelpers] <-2> completeAndNormalize: result = /Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp
[ApplicationPathHelpers] <-2> getOpenStudioApplicationPath, found '/Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp'
[OpenStudioApplicationPathHelpers] <-2> getOpenStudioApplicationPath, info.dli_fname = '/Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp'
[PathHelpers] <-2> completeAndNormalize: result = /Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp
[ApplicationPathHelpers] <-2> getOpenStudioApplicationPath, found '/Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp'
[OpenStudioApplicationPathHelpers] <-2> getOpenStudioApplicationPath, info.dli_fname = '/Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp'
[PathHelpers] <-2> completeAndNormalize: result = /Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp
[ApplicationPathHelpers] <-2> getOpenStudioApplicationPath, found '/Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp'
[OpenStudioApplicationPathHelpers] <-2> getOpenStudioApplicationPath, info.dli_fname = '/Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp'
[PathHelpers] <-2> completeAndNormalize: result = /Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp
[ApplicationPathHelpers] <-2> getOpenStudioApplicationPath, found '/Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp'
[OpenStudioApplicationPathHelpers] <-2> getOpenStudioApplicationPath, info.dli_fname = '/Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp'
[PathHelpers] <-2> completeAndNormalize: result = /Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp
[ApplicationPathHelpers] <-2> getOpenStudioApplicationPath, found '/Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp'
[OpenStudioApplicationPathHelpers] <-2> getOpenStudioApplicationPath, info.dli_fname = '/Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp'
[PathHelpers] <-2> completeAndNormalize: result = /Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp
[ApplicationPathHelpers] <-2> getOpenStudioApplicationPath, found '/Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/MacOS/OpenStudioApp'
[openstudio.osversion.VersionTranslator] <-2> Starting translation from Version 3.11.0.
[OpenStudioApp.main.QFont] <-2> Adding font worked
[OpenStudioApp.main] <-1> LibraryExecutablesPath: /Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/libexec
[OpenStudioApp.main] <-1> DataPath: /Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents
[OpenStudioApp.main] <-1> TranslationsPath: /Applications/OpenStudioApplication-1.11.1/OpenStudioApp.app/Contents/translations
[openstudio.osversion.VersionTranslator] <-2> Initial model has 943 objects.
[openstudio.osversion.VersionTranslator] <-2> Final model has 943 objects in IDF form.
[utilities.idf.Workspace] <-2> Workspace::isValid called.
[openstudio.osversion.VersionTranslator] <-2> Final model has 943 objects in Model form.
[openstudio.osversion.VersionTranslator] <-2> Starting translation from Version 3.11.0.
[openstudio.osversion.VersionTranslator] <-2> Initial model has 732 objects.
[openstudio.osversion.VersionTranslator] <-2> Final model has 732 objects in IDF form.
[utilities.idf.Workspace] <-2> Workspace::isValid called.
[openstudio.osversion.VersionTranslator] <-2> Final model has 732 objects in Model form.
`
Expected Behavior
The application will start cleanly.
Steps to Reproduce
- Install Openstudioapp from dmg installer for MacOS (ARM)
- Run the app.
Possible Solution
Details
Environment
MacOS 26.7.1
Openstudioapp 1.11.1
Context
I'd like to get openstudio running to do modeling on a single family residence project with sketchup.
Activity
sborman commentedon Oct 19, 2026
I just installed 1.12.0-rc2 and the issue reported here appears to be resolved.
brgix commentedon Oct 19, 2026
Had the very same issue with the MacOS 27.0.1. App 1.12.0-rc2 works like a charm.
gnguyen15 commentedon Oct 20, 2026
I had the same issue too.