versions fixed java macos

lib/osinfo.js

@@ -587,7 +587,23 @@ function versions(callback) {
           functionProcessed();
         });
         if (_darwin) {
-          functionProcessed();
+          // check if any JVM is installed but avoid dialog box that Java needs to be installed
+          exec('/usr/libexec/java_home -V 2>&1', function (error, stdout) {
+            const output = stdout.toString().toLowerCase();
+            if (output.indexOf('no java runtime') === -1) {
+              // now this can be done savely
+              exec('java -version 2>&1', function (error, stdout) {
+                if (!error) {
+                  const java = stdout.toString().split('\n')[0] || '';
+                  const parts = java.split('"');
+                  result.java = parts.length === 3 ? parts[1].trim() : '';
+                }
+                functionProcessed();
+              });
+            } else {
+              functionProcessed();
+            }
+          })
         } else {
           exec('java -version 2>&1', function (error, stdout) {
             if (!error) {