Cannot launch Spyder after updating to macOS 11 Big Sur, please help.

After updating my OS to macOS 11 today, I cannot seem to launch Spyder. I tried reinstall everything even reconstruct the python framework. Still does not work. When I run the following command in my terminal, the Spyder icon pops up but it stops there, nothing is being loaded and the Spyder window do not show up.

Last login: Fri Nov 13 16:07:21 on ttys000
Zhou@Jizhous-iMac ~ % Spyder/bin/spyder

I am not using Anaconda, I installed Spyder using pip.

How can I fix this? Thanks.

[impact27]

You probably didn’t run it in the correct environment. You can just uninstall everything and try again. Let me update the instructions: Installation:

conda create -n spyder-dev python=3
conda activate spyder-dev
pip install -U spyder

Run:

conda activate spyder-dev
export QT_MAC_WANTS_LAYER=1
spyder

[impact27]

I could use this technique to launch the macOS appilcation but it is a bit laggy (not as bad as with Qt 5.9): https://stackoverflow.com/questions/16184505/set-environment-variable-for-the-process-before-startup

You need to add to Spyder.app/Contents/Info.plist :

<key>LSEnvironment</key>
<dict>
    <key>QT_MAC_WANTS_LAYER</key>
    <string>1</string>
</dict>

Info.plist is cached, so it might not work directly. If that doesn’t work, the solution is to kill and rebuild the cache: /System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister -kill -seed my Info.plist now looks like:

``` <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>LSEnvironment</key> <dict> <key>QT_MAC_WANTS_LAYER</key> <string>1</string> </dict> <key>CFBundleDevelopmentRegion</key> <string>English</string> <key>CFBundleDisplayName</key> <string>Spyder</string> <key>CFBundleDocumentTypes</key> <array> <dict> <key>CFBundleTypeExtensions</key> <array> <string>py</string> <string>pyw</string> <string>ipy</string> <string>pyx</string> <string>pxd</string> <string>pxi</string> <string>c</string> <string>h</string> <string>cc</string> <string>cpp</string> <string>cxx</string> <string>h</string> <string>hh</string> <string>hpp</string> <string>hxx</string> <string>cl</string> <string>f</string> <string>for</string> <string>f77</string> <string>f90</string> <string>f95</string> <string>f2k</string> <string>f03</string> <string>f08</string> <string>pro</string> <string>m</string> <string>jl</string> <string>yaml</string> <string>yml</string> <string>patch</string> <string>diff</string> <string>rej</string> <string>bat</string> <string>cmd</string> <string>txt</string> <string>txt</string> <string>rst</string> <string>po</string> <string>pot</string> <string>nsi</string> <string>nsh</string> <string>scss</string> <string>css</string> <string>htm</string> <string>html</string> <string>xml</string> <string>js</string> <string>json</string> <string>ipynb</string> <string>enaml</string> <string>properties</string> <string>session</string> <string>ini</string> <string>inf</string> <string>reg</string> <string>cfg</string> <string>desktop</string> <string>md</string> </array> <key>CFBundleTypeName</key> <string>Text File</string> <key>CFBundleTypeRole</key> <string>Editor</string> </dict> </array> <key>CFBundleExecutable</key> <string>Spyder</string> <key>CFBundleIconFile</key> <string>spyder.icns</string> <key>CFBundleIdentifier</key> <string>org.spyder-ide</string> <key>CFBundleInfoDictionaryVersion</key> <string>6.0</string> <key>CFBundleName</key> <string>Spyder</string> <key>CFBundlePackageType</key> <string>APPL</string> <key>CFBundleShortVersionString</key> <string>4.2.0</string> <key>CFBundleSignature</key> <string>????</string> <key>CFBundleVersion</key> <string>0.0.0</string> <key>LSHasLocalizedDisplayName</key> <false/> <key>NSAppleScriptEnabled</key> <false/> <key>NSHumanReadableCopyright</key> <string>Copyright not specified</string> <key>NSMainNibFile</key> <string>MainMenu</string> <key>NSPrincipalClass</key> <string>NSApplication</string> <key>PyMainFileNames</key> <array> <string>__boot__</string> </array> <key>PyOptions</key> <dict> <key>alias</key> <false/> <key>argv_emulation</key> <false/> <key>emulate_shell_environment</key> <false/> <key>no_chdir</key> <false/> <key>prefer_ppc</key> <false/> <key>site_packages</key> <false/> <key>use_faulthandler</key> <false/> <key>use_pythonpath</key> <false/> <key>verbose</key> <false/> </dict> <key>PyResourcePackages</key> <array/> <key>PyRuntimeLocations</key> <array> <string>@executable_path/../Frameworks/Python.framework/Versions/3.8/Python</string> </array> <key>PythonInfoDict</key> <dict> <key>PythonExecutable</key> <string>/usr/local/opt/python@3.8/bin/python3.8</string> <key>PythonLongVersion</key> <string>3.8.6 (default, Oct 8 2020, 14:06:32) [Clang 12.0.0 (clang-1200.0.32.2)]</string> <key>PythonShortVersion</key> <string>3.8</string> <key>py2app</key> <dict> <key>alias</key> <false/> <key>template</key> <string>app</string> <key>version</key> <string>0.22</string> </dict> </dict> </dict> </plist> ```