I am getting some execution error when I run Harvest for mac

Issue/Introduction:

The error message in the screenshot is:
/users/testuser1/Downloads/DVDHAV9903E_macosx/client/bin/workbench ; exit;
USBOSYEYDONMBPR:~ testuser1$ /users/testuser1/Downloads/DVDHAV9903E_macosx/client/bin/workbench ; exit;
gogo: InterruptedException: sleep interrupted
java.lang.InterruptedException: sleep interrupted
at java.lang.Thread.sleep(Native Method)
at org.apache.felix.gogo.shell.Activator.run(Activator.java:72)
at java.lang.Thread.run(Thread.java:695)

I am getting some execution error when I run Harvest for mac now, is there anyone who can help me?.

The error message returned by Workbench is:
/users/testuser1/Downloads/DVDHAV9903E_macosx/client/bin/workbench ; exit;
COMPUTERHOSTNAME:~ testuser1$ /users/testuser1/Downloads/DVDHAV9903E_macosx/client/bin/workbench ; exit;
gogo: InterruptedException: sleep interrupted
java.lang.InterruptedException: sleep interrupted
at java.lang.Thread.sleep(Native Method)
at org.apache.felix.gogo.shell.Activator.run(Activator.java:72)
at java.lang.Thread.run(Thread.java:695)

I am finding another log file containing this:
!SESSION 2019-12-04 10:21:27.159 -----------------------------------------------
eclipse.buildId=unknown
java.version=1.6.0_65
java.vendor=Apple Inc.
BootLoader constants: OS=macosx, ARCH=x86_64, WS=cocoa, NL=en_US
Framework arguments: -keyring /Users/testuser1/.eclipse_keyring -showlocation
Command-line arguments: -os macosx -ws cocoa -arch x86_64 -keyring /Users/testuser1/.eclipse_keyring -showlocation

!ENTRY org.eclipse.osgi 4 0 2019-12-04 10:21:30.898
!MESSAGE Application error
!STACK 1
org.eclipse.core.runtime.CoreException: Plug-in com.ca.harvest.workbench was unable to load class com.ca.harvest.workbench.Application.
at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.throwException(RegistryStrategyOSGI.java:194)
at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:178)
at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:905)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243)
at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:55)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:191)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)
at org.eclipse.equinox.launcher.Main.run(Main.java:1465)
Caused by: java.lang.UnsupportedClassVersionError: com/ca/harvest/workbench/Application : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at org.eclipse.osgi.internal.loader.ModuleClassLoader.defineClass(ModuleClassLoader.java:285)
at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.defineClass(ClasspathManager.java:632)
at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findClassImpl(ClasspathManager.java:588)
at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClassImpl(ClasspathManager.java:540)
at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClass(ClasspathManager.java:527)
at org.eclipse.osgi.internal.loader.ModuleClassLoader.findLocalClass(ModuleClassLoader.java:324)
at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:320)
at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:395)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:345)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:337)
at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:160)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at org.eclipse.osgi.internal.framework.EquinoxBundle.loadClass(EquinoxBundle.java:568)
at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:174)
... 15 more

Cause:

SCM Workbench on the MacOSX needs Java version 1.8. We found that Java 1.6 was installed on the computer.

Environment:

Release : 13.0.3

Component : CA Harvest Software Change Manager

Resolution:

We recommend using Java 1.8 with SCM Workbench. I noticed you have Java version 1.6, so if it would be ok to upgrade Java to 1.8 that would be recommended.
If there is a reason that you need to have Java version 1.6 on your Mac computer, there’s a way to have 2 different versions of Java installed and switch between the two as you need to. See the attached instructions if needed.

Additional Information:

Attached is the process to follow to configure the Mac OS to switch between one version of Java and another.