C1 Does not yet Support Mac OS Catalina
Apple released its latest Operating System, Mac OS Catalina 10.15 on October 7th. Capture One does not yet officially support this new OS.
As a General Rule, You Shouldn’t Update Anyway
As a general rule of thumb, it’s never a good idea to update to a new OS immediately after it is available. A lot of software, including the operating system itself, will have bugs, quirks, or poor performance until the initial “.0” issues are addressed (as in version 10.15.0). It almost always makes sense to wait (in the very least) until one “dot revision” of the operating system (e.g. 10.15.1) and until all your essential software has been updated and claim official support for the new OS. Even then, operating system upgrades should be treated as “major events” wherein you should be backing up your entire computer (we suggest SuperDuper) and testing the system extensively after the update (especially, but not only, if you will be using the computer for tethering.
Specifically About Capture One
Note that while many (but not all) users who decide to ignore this advice will find that C1 is running fine, that is very different than saying it is supported. Capture One is professional software that should only be used on supported configurations. Even if it launches and works fine initially you may find quirks, bugs, or even major issues in further use, and if you do there will be no official support response beyond “Catalina is not yet supported, please use a supported OS”.
As always, new operating systems mean lots of changes to the underlying code, libraries, and engines that Capture One leverages for its class-leading performance and stability. Phase One begins testing new operating systems months before they are released. However, Apple has a bad habit of making last-minute changes, even between the last beta and the released version. Therefore, extensive testing and tweaking is needed. We have no ETA for a new version of Capture One that will support Catalina, but of course it will come, and Digital Transitions will independently test it when it does.
TLDR: Do not update to Catalina yet. Let others get cut on the bleeding edge, and join them in a month or two.