Hi Freiherr,
In general yes, it will work in Joomla 5.1 , but remember about those 1-3 things:
- Update Helix3 plugin after installing Macro template (must be Helix3 v3.0.5)
- In Macro Template settings > Advanced > Compile LESS to CSS : No > Save settings
- It may (and probably will) display some Deprecated messages becuase of using PHP 8.2/8.3 - but you can hide them in Global Configuration > Server > Error Reporting: None, OR read tip below.
ad 3) Most of them can be fixed by files override. Just download raw Helix3 template, unzip and using FTP override those files:
- templates/shaper_macro/features/contact.php
- templates/shaper_macro/features/footer.php
- templates/shaper_macro/features/menu.php
- templates/shaper_macro/features/tile.php
- templates/shaper_macro/features/social.php