The only update versions available are for Acrobat X and XI. Up until recently, it was no problem to download all the old Acrobat 9 updates, but Adobe – because Acrobat 9 and older are no longer supported – removed those update links from its update web pages for Mac and Windows. 9.0.0 for Acrobat 9), this means that you need to first upgrade your installation to the latest available version. When you install a new version of Acrobat, you always end up with a x.0.0 version (e.g.
This does not mean that Acrobat 9 does not work anymore, it means that you will not get any security updates for new security threats. You may remember that Adobe “end of life’ed” Adobe Acrobat 9 more than a year ago. Update: There is now a Knowledge Base article about updating older versions of Acrobat/Reader:
