The analysts agree that PC-makers experienced poor sales in June compared to the same month last year, but Apple still retains 4.9 per cent of the market.
The figures don't include direct sales - and 40 per cent of Apple's sales are made directly through its online Apple Store.
NPD Intelect said unit sales for June 2001 were down 26.5 per cent, and revenue was down 24.6 per cent compared with June last year.
For the first six months of 2001, total unit sales were 2.5 million, down 19.5 per cent from the year ago period. Revenue for the first half of 2001 was $2.5billion, down 25.5 per cent from last year.
Poor sales have prompted price reductions, and PC makers have been forced to lower profit margins, according to the firm.
The top five PC movers-and-shakers are: HP, which controls 42.8 per cent of market share; Compaq, which has 34.2 per cent; Emachines which has 10.4 per cent; Apple, which accounts for 4.9 per cent; and Sony, which captured 3.9 per cent.