JDK 7 and JRE 7 Installation Guide. Installation of JRE and JDK of 7u6 or later require Mac OS X 10.7.3 (Lion) or later. Java SE Server JRE does not include the Java plug-in or Java Web Start support, additional tools might be removed from future versions. In order to run Java applets within a browser, you must install the JRE plugin manually. This does not apply to the Java SE server JRE.”]
Source: https://docs.oracle.com/javase/7/docs/webnotes/install/index.html