Can I use 1067 MHz ddr3 Ram in a late 2012 iMac?

Does System Information report the same thing?? Sometimes I wonder if "About this Mac..." is always accurate. SI is in the folder path Applications > Utilities. This is how SI's Memory info displays on a newer iMac:

I'm surprised 1067 works at all. The last iMac speced for 1067mhz RAM was the Late 2009. It's common for RAM rated faster than the system to clock back, but slower RAM more often causes crashes or failures to start.

We've bought all or Mac RAM fro OWC for over a decade. This is their listing for your iMac using two 8GB modules:

https://eshop.macsales.com/item/OWC/1600DDR3S16P/

No it is totally different RAM.

While it physically matches it won't run at the correct speed and may cause kernel panics. What does it say when you click the Memory tab? Is all the ram 1067MHz? If just one module is it will slow the entire system down to that speed.

If you’re planning on upgrading the ram just remember that if you leave one module of the slower ram in the Mac will slow ALL of the ram to that speed. Replace it all at once or not at all and use quality tam from a either Crucial or OWC for the best reliability.