| Operating Environment | Minimum Level |
| Apache 2.4 | 7.102A |
| Apache 2.2 | 7.101A |
| Apache 2.0 | 6.100F |
| Apache 1.3 | 5.521A |
| IIS 8.0 | 7.102A |
| IIS 7.5 | 7.102A |
| IIS 7.0 | 7.101C |
| IIS 6.0 | 7.101A |
| IIS 5.1 | 6.100F |
| Sun Java System Web Server 6.1 | 5.521AA |
When testing for support of new operating systems and subsystems, Macro 4's policy is to only test the current GA (General Availability) and EA (Early Availability) releases.
Macro 4 always recommend customers upgrade to the current release of software. We offer full support for current releases and will provide, where possible, fixes to older releases via a patch mechanism. In some cases a full upgrade to the current release may be required.