Server Macos 5.6.3 Direct

: At least 14.3GB of available space is recommended for a full upgrade. The "Spring 2018" Transition Does 5.6.3 delete deprecated services? - Apple Community

To run macOS Server 5.6.3, your hardware must meet the following criteria: Server MacOS 5.6.3

: Restricted to Mac models that natively support macOS 10.13 High Sierra. Memory : Minimum 2GB RAM . : At least 14