The Paris event, which was to take place on 26-30 September, was set to be one of the largest IT events in Europe, with a predicted attendance of 50,000 people over the duration of the show.
Apple chief executive officer Steve Jobs, in a statement posted on the show's Web site, commented: "We're cancelling Apple Expo in the wake of last week's devastating and tragic events. We're sorry to disappoint our users and developers, but their safety is our primary concern."
The company's UK spokesman, David Millar, told CW360 that no one would miss out on any major announcements as a result of the cancellation.
"We traditionally tend to make big announcements at the large shows, and as such a head of steam was building up with people expecting us to announce new products in Paris, so we took the decision prior to last week's events to announce that we would not be making any major hardware announcements."
Millar revealed that Jobs' keynote speech would have focused on the forthcoming release of the first major upgrade of Mac O/S 10, the company's Unix-based operating system, called Mac O/S 10.1.
Millar said Apple was optimistic about the London event, but he sounded a note of caution.
"We currently intend to attend MacExpo, but it really depends on how things pan out over the next few weeks and months, as it is the safety of our customers and developers that is paramount."