Q: When I tried to update PDF Studio to the latest version on macOS big Sur, I received an “Invalid checksum” error message. How can I update to the latest version?
A: Recent macOS changes require an application to be notarized with a developer certificate before it can be installed. This notarization process modifies the installer which on some machines can produce a checksum validation error when it is run in the background during the update process. We are currently working with our installer application to try and resolve this.