The analyst firm attributed Apple's success this year to the expansion of the its retail store network and the refresh of the Macbook Air line with Sandy Bridge.
While Apple saw healthy growth in its sales, the same could not be said for the overall PC market, which IDC discovered dropped by eight per cent quarter-on-quarter in Q3 2011 to 1.61 million unit shipments.
Most of the largest vendors suffered a downturn in sales in 2011, but IDC found that Hewlett-Packard was the one that had taken the strongest hit in the market.
IDC market analyst, Amy Cheah, attributes HP’s woes to delays in government project roll outs, as well as HP's channels cutting back on stock due to perceived market softness.
“The unfortunate 'PSG spin off' debacle also momentarily affected confidence in HP's strategic outlook, which opened a window of opportunity for competitors such as Apple to gain share," she added.
Despite national retailers such as Harvey Norman running aggressive promotions to bolster consumer demand for PC products, which helped push the market up another three per cent over the same period last year, concerns over the Carbon Tax and the deteriorating European economy, as well as shortages of AMD processors, resulted in a market that failed to meet forecasts.
Factoring in year end seasonal sales and the education rollout period, IDC foresees the A/NZ PC market to grow ten per cent quarter-on-quarter to 1.77 million unit shipments.
Since IDC believes that most Q4 inventory orders were placed before the HDD shortage took effect, due to the severe flooding in Thailand, Christmas sales and large education deals in Queensland and New South Wales are not expected to be heavily disrupted.
However, the situation is predicted to worsen in Q1 2012, when existing HDD inventories are depleted before eventually recovering in Q2 2012.