OpenWebStart is available for macOS, Windows and Linux. The recommended minimum system requirements of OpenWebStart itself are:
- 2 GHz dual core processor
- 1 GB RAM (system memory)
- 200 MB of hard-drive space (for the OpenWebStart core installation)
In addition to that, memory and hard-drive space consumption are mainly influenced by the number of JVMs downloaded and the JNLP applications installed and cached on your system.