Hi, I am currently running Mojave 10.14.6 and am unable to upgrade due to running an old version of ProTools. Will premier pro support this OS for the foreseeable future? I don't want to buy a years worth of PP unless it's going to be useable for that period.
I can't speak for Adobe but Mojave is currently the oldest MacOS operating system to be currently supported under the latest versions of Premiere Pro (14.5 and up). Premiere Pro 2019 and earlier versions of 2020 support back to High Sierra.
I would suspect you'll be OK for next year ... and don't forget if Mojave IS dropped in future versions you can still stay with a version that does support Mojave.