Good idea Karina. Unfortunately, that didn't work either.

I tried modifying LIB_ITEMS_SERVER_SORT as per those articles and that made no difference either. I suspect the render presets don't use this flag. We likely need a RENDER_PRESETS_SERVER_SORT

I have Poser (and OSX) on an SSD but keep my runtime content on an external HDD.

The above did remind me that the library/runtimes also do not order alphabetically for me either - which also happened to be annoying me, but I noticed that I can edit the XML for the runtimes myself ( LibraryPrefs.xml ) - and have done which is a blessing.