Apple made significant security changes to Gatekeeper in macOS 10.12 Sierra that affects the installation of form•Z. Please read and consider the following if you are contemplating upgrading to macOS 10.12 Sierra.
form•Z v8.5 is compatible with macOS 10.12 Sierra. Older form•Z versions through v6 have not been extensively tested with macOS 10.12 Sierra. These versions functioned properly in limited testing and are expected to function well (but are not guaranteed to do so).
Installation (or reinstallation) of form•Z onto a machine running macOS 10.12 Sierra is affected by the new security restrictions imposed by Gatekeeper in macOS 10.12 Sierra as follows:
form•Z 8.5 can be installed on macOS 10.12 Sierra using the form•Z 8.5.6 disk images (which were released on 10/6/16). These disk images can be accessed using the installation links in your original license information email.
form•Z 8.0, form•Z 7.x and any version of bonzai3d cannot be installed on macOS 10.12 Sierra. You will need to upgrade to 8.5 or install on a machine with 10.11 (or earlier) and copy the installation to the macOS 10.12 Sierra machine.
form•Z 6 is not affected by the OS X 10.12 Sierra security changes as this version is not a native OS X (macOS) application (however form•Z 6 has not been extensively tested with OS X 10.12 Sierra).
In general, any version of form•Z (or bonzai3d) that is installed on a machine prior to upgrading to macOS 10.12 Sierra will function, but be aware of the installation limitations should re-installation become necessary.