Texifier takes periodic snapshots of documents that are being edited and stores them in case of emergency.
On macOS, backups may be found in the
~/Library/Application Support/Texifier/Editor-Archive/
folder.
Please note that the Application Support subfolder for the app may still follow the old naming scheme. Please check apps/troubleshooting/platform-specifics/macos/application-support-folder article if you do not find the above folder.