Those "last two data points" are two months. For OS X, there's some upward movement the last two months (about 3%, which isn't a lot given it spiked late last year from 8.3% to 14.07% to 8.2% in a span of three points), while Linux is practically flatlined with a very light upward incline just the last month.

To the extent StatCounter is useful to begin with, the Linux point is functionally meaningless while the OS X increase of a few percentage points may or may not be significant; trying to divine a trend from twitches in those two points is reading noise. Look at the "unknown" line, meanwhile, and see how it begins mirroring Windows' decline around mid–late 2025. It rose from 11.3% in September 2025 to 21.5% in June 2026. That represents actual, meaningful, lasting change.