Here is a chart pie that represents the share of Apple’s revenue with its various sectors. We first find the iPhone with USD 61.6 billion in revenue, services with USD 8.4 billion, the Mac with USD 6.8 billion, the iPad with USD 5.9 billion and other products with USD 5.5 billion.
Apple is therefore essentially dependent on the success of the iPhone and new versions released each year. Over time the brand is trying to diversify into new sectors, such as cars, television or artificial intelligence.
Source: Q1 2018 Unaudited Summary Data.