Just Download here on Google.
And you may meet the problem just as me

 yiweiyang ~ Downloads > JEB.android.decompiler.3.0.0.201808031948Pro > sh ./jeb_macos.sh
2020-02-15 05:51:30.768 jeb[1807:69065] Failed to find library.:
2020-02-15 05:51:30.769 jeb[1807:69065] jeb:Failed to locate JNI_CreateJavaVM
2020-02-15 05:51:30.769 jeb[1807:69065] jeb:Failed to launch JVM

This may because the Jeb failed to locate the right JDK and on macOS or other unix-like system, java is determined through the /usr/libexec/java_home -V other than JAVA_HOME

Solve it

First Download the JDK on Oracle.
Then

/usr/libexec/java_home -V
Matching Java Virtual Machines (3):
    12.0.1, x86_64: "OpenJDK 12.0.1"    /Library/Java/JavaVirtualMachines/openjdk-12.0.1.jdk/Contents/Home
    1.8.0_241, x86_64:  "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_241.jdk/Contents/Home
    1.8.0_222, x86_64:  "AdoptOpenJDK 8"    /Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home

Write

<key>JVMCapabilities</key>
<array>
    <string>CommandLine</string>
    <string>JNI</string>
    <string>BundledApp</string>
</array>

to /Library/Java/JavaVirtualMachines/jdk1.8.0_241.jdk/Contents/Info.plist

sudo mkdir -p /Library/Java/JavaVirtualMachines/jdk1.8.0_241.jdk/Contents/Home/bundle/Libraries
sudo ln -s /Library/Java/JavaVirtualMachines/jdk1.8.0_241.jdk/Contents/Home/jre/lib/server/libjvm.dylib /Library/Java/JavaVirtualMachines/jdk1.8.0_241.jdk/Contents/Home/bundle/Libraries/libserver.dylib

To check

 /usr/libexec/java_home -t BundledAPP
/Library/Java/JavaVirtualMachines/jdk1.8.0_241.jdk/Contents/Home

Done

sh ./jeb_macos.sh
Memory Usage: 61.5M allocated (20.5M used, 41.0M free) - max: 910.5M
JEB v3.0.0.201808031948 (release/full/individual/air-gap/any-client/core-api)
Current directory: /Users/yiweiyang/Downloads/JEB.android.decompiler.3.0.0.201808031948Pro/bin/jeb.app/Contents/Java
Base directory: /Users/yiweiyang/Downloads/JEB.android.decompiler.3.0.0.201808031948Pro
Program directory: /Users/yiweiyang/Downloads/JEB.android.decompiler.3.0.0.201808031948Pro/bin
System: Mac OS X 10.15.2 (x86_64) en_CN
Java: Oracle Corporation 1.8.0_241
Plugin loaded: com.pnf.plugin.oat.OATPlugin
Plugin loaded: com.pnf.androsig.gen.AndroidSigGenPlugin
Plugin loaded: com.pnf.androsig.apply.andsig.AndroidSigApplyPlugin
Plugin loaded: com.pnf.plugin.pdf.PdfPlugin