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I'm experimenting with the Accessibility API and I'm currently trying to interrogate the system wide accessibility element.According to AXUIElementCopyAttributeNames the system wide element has 4 attributes (AXRole, AXRoleDescription, AXFocusedUIElement & AXFocusedApplication).I can successfully use the following chunk of code to get the attribute value for the AXRole and AXRoleDescription elements but when I try to get the value of the AXFocusedUIElement or AXFocusedApplication attributes AXUIElementCopyAttributeValue returns kAXErrorCannotComplete.AXUIElementRef systemWideElement = AXUIElementCreateSystemWide(); CFStringRef attrName = kAXFocusedApplicationAttribute; CFTypeRef value = NULL; res = AXUIElementCopyAttributeValue(systemWideElement, attrName, &value); if (res != kAXErrorSuccess) NSLog(@"Failed to get element attribute %@ (%d)", attrName, (int)res); if (value) CFRelease(value);Does anybody know why AXUIElementCopyAttributeValue is returning kAXErrorCannotComplete / what I'm doing wrong?Thanks