The complete changelog is available here.

macOS: Inclusion of libqxp/libzmf to bring parity across OSes for importing of QXP and ZMF files.

We have an experimental release that allows the use of Python3 if the user has XCode installed. For those that use the Scripter functionality, our default DMG download of Scribus on macOS uses Python 2.x installed with the operating system. It will run correctly without security warnings from Apple on Mojave through Big Sur.

macOS: Scribus 1.5.7 notarization has been fixed.

Render frames are now pre-configured for the use of XeLaTeX.

Unification and standardization of the user interface regarding margins, button and widget sizing, thanks to the tireless work of Gyuris Gellért.

Improved font embedding for OpenType fonts in PDF/X-4.

It should be noted that this new feature is still experimental.

As of version 1.5.7, Scribus can import text as editable text from PDF files.

As of version 1.5.7, the minimum Qt version to compile Scribus is 5.14.

Fixed: Issue with Qt menu heuristics causing translations not to work.

Support for later versions of dependencies such as poppler and podofo.

Improvements for undo and redo of grouped items.

If you think you need the changes, you have to check out the SVN repository and build 1.4.9svn from source. Please note that while some bug fixes still may be backported to the 1.4.x branch, we do not plan an official release of this version anymore. However, there are also some new features. A few remaining issues aside, this release has been thoroughly tested and is considered to be stable.

Apart from bug fixing this also meant to refine previously introduced features, as well as preparing the code for future Qt versions.

Significant effort went into clean up of user interface margins and widget sizing, however most changes have taken place 'under the hood'. The Scribus Team is pleased to announce the release of version 1.5.7.

Scribus wiki