Facebook isn't archiving my data! Now what?

[confused composing]

You said you tried that using FB mobile web, have you tried access FB full site?
(I don't know what is Mac book) But, do try access https://www.facebook.com. If your Mac Book was considered as mobile, it will force you to the mobile web as that is the default for mobile, but don't worry, just click your browser Menu, then tick something like 'view as desktop', it will give you the FB full site.
Or you may try doing the procedure again using a computer. Once you get the link to download your data, you can do it via your Mac Book or better via computer if your Mac can't handle the huge downloading (not only message you know, but many others as well as your albums).