That’s not pages, it’s Apple’s Pages—the word processing and document layout application.
We were talking recently about making web pages and documents accessible, in reference to this Wintel-centric document, Creating accessible PDFs.
So I searched around a bit (on this query: apple pages accessibility checker) and found these links.
Create accessible documents, spreadsheet, or presentations with Pages, Numbers, or Keynote (a guide from Apple, following various standard techniques)
Make Accessible PDFs – 10 Easy Steps! (a one-pager)
Create and verify PDF accessibility, Acrobat Pro (this is the solution most like using Word: follow the guidelines in Pages, print to PDF, and then check with Acrobat Pro)
Accessibility – Apple (Their splashy site with info about many devices and their technologies)
Creating ePub documents with Pages (not a checker, but it’s organized in a way that addresses accessibility)
Reading Email with VoiceOver and Apple Mail (just that)
Improve accessibility with the Accessibility Checker (for MS Word, but something to think about as a comparison)
Accessible PDFs with a Macintosh Computer (mostly: open up your document in Windows on a PC to make it fully compatible)
I’ll add this little tidbit about creating a link: highlight the text you want the link to be underneath, and then use cmd-K (or, I think ctrl-K on a PC) to get the popup for entering the link to appear. This works in many, many applications, and on Moodle, too!