MacPro5,1, mass-produced 3-4 years after the MacPro4,1 with exact same hardware (sans delidded cpu).
They didn’t start mass production 3-4 years later. That’s the difference. It is possible that they are taking over production for a product that is already being sold, but my interpretation was that since they are
starting mass production, that implies it is a new product.
This got me to wonderin', and it seems that as late as March 2006 Apple's website listed the Intel and PowerPC models side-by-side, with prices
You are correct. What I was referring to was how they sold both the
PowerBook G4 and the
MacBook Pro at the same time for a short period. Technically the MBP is its own product, but it is thought to be the true successor to the PowerBook G4.
So they had a high-end PPC and a high-end Intel notebook being sold at the same time. Just with different names to denote the different processors.
Of course Apple didn't. It wouldn't make any sense either.
"We did a huge marketing campaign telling you how great Intel processors are, but we're going to offer PPC and Intel versions of the iMac for you to choose from?"
The reason for this was because the professional markets could not transition as quickly to Intel as the consumer markets, which is why we saw (for a short time) both the PowerBook and MacBook Pro being sold together. Apple of course wanted to transition as quickly as possible, but also didn't want to upset the pro community.
It is my theory that is why we got the current 2019 intel Mac Pro redesign 6 months before they announced the transition to Apple Silicon Macs. Professionals will have a hard time transitioning over to ARM, and they wanted to provide a product that we can use during the transition. Same goes for the current intel 27" iMac. I think this will be the last intel iMac, and Apple wanted to make sure it came with all the necessarily features professionals want, so we can take our time transitioning. If you buy one of these machines now, you will be safe for the next 3-5 years, and by then most professional applications should be able to run on ARM without the need for rosetta 2.