Thanks Will.Hey theism. I had my enrol on Wednesday. Monday is indeed the last enrolment session. You're correct that you can't enrol into your units / register in your classes for the timetable until you've received your academic advice and officially been accepted into your Degree.
7. One final note on textbooks before you begin semester. You can find the textbooks required for your units by following this link, http://www.coop-bookshop.com.au/bookshop/action/DataSubjSelect selecting ‘Macquarie University 2013 Session 1' and entering a relevant unit code. Textbooks are often very expensive, cheaper alternatives to the Co-op book shop often include
www.textbookexchange.com.au (for second hand text books- you will have to make an account to search)
http://booko.com.au/ (for new and used price comparisons)
If it gets to the point where semester is a few days away and you still haven't bought your textbooks i would buy them online from the Co-op; they have free and fast delivery which will save you having to line up for hours.
Note that if you plan to buy from a website, you should do it several weeks before semester begins so that you receive them in time.