Apple CEO Steve Jobs announced at the company's annual shareholder's meeting that TV ads centered on the Mac will air next week. The timing marks the start of the May sweeps period, when television networks unveil season finales to boost ratings during a month when local ad rates are set, according to News.com. Jobs announced the plan after a shareholder asked why Apple hasn't acquired more market share over the past few years. The company's market share declined slightly during Q1, partially due to potential customers waiting for the completion of the Intel transition, according to Jobs. The executive said Mac sales will grow once the transition is complete later in the year.