# Processing4 : Exported apps on Mac fail to launch because of Java errors

**URL:** <https://discourse.processing.org/t/processing4-exported-apps-on-mac-fail-to-launch-because-of-java-errors/30476>\
**Category:** Processing\
**Created:** [June 3, 2021, 2:30pm UTC](https://discourse.processing.org/t/processing4-exported-apps-on-mac-fail-to-launch-because-of-java-errors/30476 "2021-06-03T14:30:12Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![schmittmachine](https://avatars.discourse-cdn.com/v4/letter/s/46a35a/32.png) [@schmittmachine](https://discourse.processing.org/u/schmittmachine)\
**Post date:** [June 3, 2021, 2:30pm UTC](https://discourse.processing.org/t/processing4-exported-apps-on-mac-fail-to-launch-because-of-java-errors/30476/1 "2021-06-03T14:30:12Z")

</div>

Using Processing4 (v4.0a3), I have trouble running exported applications on Mac (Catalina).  
It worked fine with Processing3.

When I launch the exported app, it just exits right away.  
When I try to launch the app using the executable inside the app package, I get more meaningful logs, listed below.

When I have java8 installed, I get this error :

MBP-Antoine-2020:~ antoine$ /Users/antoine/Documents/Artworks/BlackSquare/dev/Test/TestP4/application.macosx/TestP4.app/Contents/MacOS/TestP4 ; exit;  
2021-06-03 16:19:51.292 TestP4[47541:2601496] NSString \*findJavaDylib(NSString \*, \_Bool, \_Bool, \_Bool, \_Bool) Searching for a JRE.  
2021-06-03 16:19:51.356 TestP4[47541:2601496] int launch(char \*, int, char \*\*) Launchpath: /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/jli/libjli.dylib  
2021-06-03 16:19:51.375 TestP4[47541:2601545] NSString \*findJavaDylib(NSString \*, \_Bool, \_Bool, \_Bool, \_Bool) Searching for a JRE.  
2021-06-03 16:19:51.440 TestP4[47541:2601545] int launch(char \*, int, char \*\*) Launchpath: /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/jli/libjli.dylib  
Error: A JNI error has occurred, please check your installation and try again  
Exception in thread “main” java.lang.UnsupportedClassVersionError: TestP4 has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0  
at java.lang.ClassLoader.defineClass1(Native Method)  
at java.lang.ClassLoader.defineClass(ClassLoader.java:756)  
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)  
at java.net.URLClassLoader.defineClass(URLClassLoader.java:468)  
at java.net.URLClassLoader.access$100(URLClassLoader.java:74)  
at java.net.URLClassLoader$1.run(URLClassLoader.java:369)  
at java.net.URLClassLoader$1.run(URLClassLoader.java:363)  
at java.security.AccessController.doPrivileged(Native Method)  
at java.net.URLClassLoader.findClass(URLClassLoader.java:362)  
at java.lang.ClassLoader.loadClass(ClassLoader.java:418)  
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)  
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)  
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:601)

When I install JRE 11, I get this error :

/Users/antoine/Documents/Artworks/BlackSquare/dev/Test/TestP4/application.macosx/TestP4.app/Contents/MacOS/TestP4 ; exit;  
2021-06-03 16:02:38.772 TestP4[46938:2588137] NSString \*findJavaDylib(NSString \*, \_Bool, \_Bool, \_Bool, \_Bool) Searching for a JRE.  
2021-06-03 16:02:38.772 TestP4[46938:2588137] NSString \*findJREDylib(int, \_Bool, \_Bool) JRE search exception: ‘launch path not accessible’  
2021-06-03 16:02:38.837 TestP4[46938:2588137] int launch(char \*, int, char \*\*) Launchpath: /Library/Java/JavaVirtualMachines/jdk-11.0.11.jdk/Contents/Home/lib/jli/libjli.dylib  
2021-06-03 16:02:38.862 TestP4[46938:2588148] NSString \*findJavaDylib(NSString \*, \_Bool, \_Bool, \_Bool, \_Bool) Searching for a JRE.  
2021-06-03 16:02:38.862 TestP4[46938:2588148] NSString \*findJREDylib(int, \_Bool, \_Bool) JRE search exception: ‘launch path not accessible’  
2021-06-03 16:02:38.875 TestP4[46938:2588148] int launch(char \*, int, char \*\*) Launchpath: /Library/Java/JavaVirtualMachines/jdk-11.0.11.jdk/Contents/Home/lib/jli/libjli.dylib  
java.lang.RuntimeException: java.lang.ClassNotFoundException: --full-screen  
at processing.core.PApplet.runSketch(PApplet.java:10712)  
at processing.core.PApplet.main(PApplet.java:10518)  
at TestP4.main(TestP4.java:38)  
Caused by: java.lang.ClassNotFoundException: --full-screen  
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)  
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)  
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)  
at processing.core.PApplet.runSketch(PApplet.java:10705)

This is a minimal app:  
void setup() {  
fullScreen(P3D);  
frameRate(60);  
}

void draw() {  
background(0);  
fill(255);  
rect(100, 100, 200, 200);  
}

There seems to be some issues with Java version, but I don’t understand what is happening.

Thanks for any help !

---

<div class="post-metadata">

**Author:** ![svan](https://avatars.discourse-cdn.com/v4/letter/s/82dd89/32.png) [@svan](https://discourse.processing.org/u/svan)\
**Post date:** [June 3, 2021, 4:17pm UTC](https://discourse.processing.org/t/processing4-exported-apps-on-mac-fail-to-launch-because-of-java-errors/30476/2 "2021-06-03T16:17:46Z")

</div>

For whatever it’s worth, my Big Sur system is using java 16.0.1.