diff --git a/App.config b/App.config
index de6e6b1cea..eb28afb250 100644
--- a/App.config
+++ b/App.config
@@ -7,6 +7,7 @@
   </configSections>
   <appSettings>
     <add key="ikvm:org.bouncycastle.asn1.allow_unsafe_integer" value="true" />
+    <add key="ikvm:Log4jContextSelector" value="org.apache.logging.log4j.core.selector.BasicContextSelector" />
   </appSettings>
   <startup>
     <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7"/>
diff --git a/cli/osx/build.xml b/cli/osx/build.xml
index ad4f602b4f..23e8642882 100644
--- a/cli/osx/build.xml
+++ b/cli/osx/build.xml
@@ -23,7 +23,7 @@
     <property name="app.runtime.archs" value="'x86_64 arm64'"/>
     <property name="app.runtime.system.min" value="10.12"/>
     <property name="app.runtime.args"
-              value="-client --add-opens=java.base/sun.security.ssl=ALL-UNNAMED --add-opens=java.base/sun.security.util=ALL-UNNAMED --add-opens=java.base/java.lang=ALL-UNNAMED -Djava.library.path=$APP_PACKAGE/Contents/Frameworks -Djna.boot.library.path=$APP_PACKAGE/Contents/Frameworks -Djna.library.path=$APP_PACKAGE/Contents/Frameworks -Djna.nounpack=true -Djava.awt.headless=true -Dsun.jnu.encoding=utf-8 -Dfile.encoding=utf-8 -Dsun.io.useCanonCaches=false -XX:+UseG1GC -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=20 -XX:+UseStringDeduplication"/>
+              value="-client --add-opens=java.base/sun.security.ssl=ALL-UNNAMED --add-opens=java.base/sun.security.util=ALL-UNNAMED --add-opens=java.base/java.lang=ALL-UNNAMED -Djava.library.path=$APP_PACKAGE/Contents/Frameworks -Djna.boot.library.path=$APP_PACKAGE/Contents/Frameworks -Djna.library.path=$APP_PACKAGE/Contents/Frameworks -Djna.nounpack=true -Djava.awt.headless=true -Dsun.jnu.encoding=utf-8 -Dfile.encoding=utf-8 -Dsun.io.useCanonCaches=false -DLog4jContextSelector=org.apache.logging.log4j.core.selector.BasicContextSelector -XX:+UseG1GC -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=20 -XX:+UseStringDeduplication"/>
 
     <property name="build.xcodeoptions"
               value="JVM_RUNTIME_ARGS='${app.runtime.args}' JAVA_HOME=${java.home} SYMROOT=${build} SDKROOT=macosx ARCHS=${app.runtime.archs} MACOSX_DEPLOYMENT_TARGET=${app.runtime.system.min}"/>
diff --git a/osx/build.xml b/osx/build.xml
index 49aad46a67..2083e75652 100644
--- a/osx/build.xml
+++ b/osx/build.xml
@@ -31,7 +31,7 @@
     <property name="app.runtime.archs" value="'x86_64 arm64'"/>
     <property name="app.runtime.system.min" value="10.12"/>
     <property name="app.runtime.args"
-              value="-client --add-opens=java.base/sun.security.ssl=ALL-UNNAMED --add-opens=java.base/sun.security.util=ALL-UNNAMED --add-opens=java.base/java.lang=ALL-UNNAMED -Djava.library.path=$APP_PACKAGE/Contents/Frameworks -Djna.boot.library.path=$APP_PACKAGE/Contents/Frameworks -Djna.library.path=$APP_PACKAGE/Contents/Frameworks -Djna.nounpack=true -Djava.awt.headless=true -Dsun.jnu.encoding=utf-8 -Dfile.encoding=utf-8 -Dsun.io.useCanonCaches=false -XX:+UseG1GC -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=20 -XX:+UseStringDeduplication"/>
+              value="-client --add-opens=java.base/sun.security.ssl=ALL-UNNAMED --add-opens=java.base/sun.security.util=ALL-UNNAMED --add-opens=java.base/java.lang=ALL-UNNAMED -Djava.library.path=$APP_PACKAGE/Contents/Frameworks -Djna.boot.library.path=$APP_PACKAGE/Contents/Frameworks -Djna.library.path=$APP_PACKAGE/Contents/Frameworks -Djna.nounpack=true -Djava.awt.headless=true -Dsun.jnu.encoding=utf-8 -Dfile.encoding=utf-8 -Dsun.io.useCanonCaches=false -DLog4jContextSelector=org.apache.logging.log4j.core.selector.BasicContextSelector -XX:+UseG1GC -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=20 -XX:+UseStringDeduplication"/>
 
     <property name="build.xcodeoptions.default"
               value="JVM_RUNTIME_ARGS='${app.runtime.args}' JAVA_HOME=${java.home} SYMROOT=${build} SDKROOT=macosx ARCHS=${app.runtime.archs} MACOSX_DEPLOYMENT_TARGET=${app.runtime.system.min}"/>