Question about Microsoft 365 Family Deutsch

We have been working with ADOBE ACROBAT PRO 9 (2008) for a long time and would like to replace this software. Our requirement: > Save, edit, convert etc. common PDF files. > merge PDF files > and: we have 3 computers in the family (all Apple) > and: we prefer the "unlimited" version (no annual subscription costs). Which ACROBAT_version suits our purposes? Thank you for precise info.