My estimate of 75 million was conservative, it’s closer to 80 million.
Half of all new Macs are sold to people who are ‘new to Mac’[1]. Even the people who buy a replacement for their old Mac will often find other uses for that old Mac or they will sell it or give it away.
One year a go, Mac install base was 66 million. Since then, 17 million Macs have been sold. 8.5 million of those are sold to people who never owned a Mac before. Let’s imagine that all the remaining 8.5 million units are bought by existing Mac users, and that half of them are bought because the old Macs died. That gives us a new total of 78.75 million.
