But the PC sales slump has also affected Apple Inc's AAPL.O Mac computer lineup, which is the leading source of sales for Arm-based PC chips. In the fourth quarter, Intel had 68.7% market share for x86 processors versus AMD's 31.3%, which was up from 28.5% a year earlier, according to Mercury Research. After snapping up PCs and laptops for working from home during the pandemic, consumers and businesses have slowed their purchases amid rising inflation and economic uncertainty.