On MacOS, do not assume existence of Contents/Home in the JDK binar…

…y path (#9684)

lib/scala/runtime-version-manager/src/main/scala/org/enso/runtimeversionmanager/components/GraalRuntime.scala

@@ -31,10 +31,20 @@ case class GraalRuntime(version: GraalVMVersion, path: Path) {
   def javaHome: Path =
     OS.operatingSystem match {
       case OS.Linux   => path
-      case OS.MacOS   => path / "Contents" / "Home"
+      case OS.MacOS   => findMacOSJavaPath()
       case OS.Windows => path
     }
 
+  /** The bin/ directory may or may not be inside Contents/Home, so check both
+    * possibilities.
+    */
+  def findMacOSJavaPath(): Path = {
+    val contentsHomePath = path / "Contents" / "Home"
+    if (Files.exists(contentsHomePath))
+      contentsHomePath
+    else path
+  }
+
   /** The path to the `java` executable associated with this runtime. */
   def javaExecutable: Path = {
     val executableName = if (OS.isWindows) "java.exe" else "java"