A minor update of Notebooks for Mac is available for download. You can get Notebooks 1.4.1 for Mac directly from the download page or from the Mac App Store. To learn more about the changes, improvements and corrections, please visit the version history page.
Mac App Store version
Users of the Mac App Store version of Notebooks should update through the App Store app.
Non-Mac App Store version
You can either use the integrated update option (available since Notebooks 1.3.1 on macOS 10.7 and above), or download the disk image from this site, open it and copy the Notebooks app into your Applications folder.