| Operating Environment | Minimum Level |
| z/VM 7.1.0 | 4.500E |
| z/VM 6.4.0 | 4.500E |
| z/VM 6.3.0 | 4.500E |
| z/VM 6.2.0 | 4.500E |
| z/VM 6.1.0 | 4.500E |
| z/VM 5.4.0 | 4.500E |
For versions lower than 5.4.0 contact Macro 4
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.