Rhombus IM Client requires Java 1.4.2 or higher. We officially test and support Rhombus IM Client on the following operating systems and architectures:
| Architecture | Versions | Minimum Hardware |
| Microsoft Windows | 95 98 ME NT 4 2000 XP Server 2003 |
Intel Pentium 133MHz or higher 32 MB RAM |
| Linux | Debian 3.0 Red Hat 8, 9 |
Intel Pentium 133MHz or higher 32 MB RAM |
| SUN | Solaris 8 Solaris 9 |
any |
| AIX | AIX 4 with JVM 1.4.1 | any |
| Mac OS X | OS X 10.2 "Jaguar" OS X 10.3 "Panther" |
G3 400 MHz or higher, G4 recommended 64 MB RAM |