Java, Nand2tetris, Macos, Computer Systems, Adelaide University.
output below, openjdk version "11.0.10" 2021-01-19 OpenJDK Runtime Environment (build 11.0.10+9) OpenJDK 64-Bit Server VM (build 11.0.10+9, mixed mode) If you can see java version or openjdk version then the java has been installed already. Otherwise, there is no java on your computer. Then you