Not saying macOS wasn't great. It was. But Apple aren't investing in it anymore.
https://daringfireball.net/linked/2021/04/28/aapl-q2-2021-re...
If you think that increases in Mac sales mean that macOS is a growing part of Apple's revenue: it isn't: macOS is dwarfed by other products more every year.
https://www.statista.com/statistics/382136/quarterly-segment...
According to https://www.apple.com/newsroom/2021/04/apple-reports-second-..., Apple “posted a March quarter record revenue of $89.6 billion, up 54 percent year over year …”.
Mac, on the other hand, grew by 69 percent year over year.
You're speaking about raw numbers.
From that report:
$47.94 billion: iPhone (Up 65%) $9.1 billion: Mac (Up 70% YOY) $7.81 billion: iPad (up 79% YOY)
To let us know what Apple prioritises, though, we need to look at percentages of the operating unit as a percent of Apple revenue.
Mac revenue was 4.8 in 2014, 5.2% in the most recent figure I could find.
https://barefigur.es/companies/apple/products/
We can also look at company reorgs like getting rid of the macOS team, advertisements steering customers away from macOS, and other public facts.
There's only "an app for that" if you have developers.
Having said that Apple needs only to meet the very, very low bar of having a better ecosystem than Android.