I use Xplane 11 on MAC PRO late 2013 with MAC OS Sierra 10.12.6, latest macOS version on this Mac.
I subscribed to the Update Program in order to use updated IFR procedures on the G1000 on X plane BUT actual SIMBRIEF requires 10.13 Mac OS , which I cannot install .
Do you have a SIMBRIEF OR FMS DATA MANAGER version that runs on Mac OS 10.12.6 ?
Or other indications to solve the issue ?
Many Thanks and best regards
Cosimo
You can use the manual installers, at the end of the downloads page:
Basically you unzip the files and place them in the correct folder.
In the case of X-Plane 11, you download and extract xplane11_native_2604.zip and place the contents of the extracted folder (*.dat files, CIFP folder etc.) in X-Plane 11 > Custom Data.
For some third-party addons, the GNS430 database may also help: download and extract xplane_customdata_native_2604.zip and place its contents (index file and navdata folder) in X-Plane 11 > Custom Data.
Regards,
Tim