Yes 2007 works on Sierra but will not on High Sierra because High Sierra requires 64 bit programs. I guess I'll be holding off on High Sierra as long as possible, then it is back to the VM's. I had to use dropbox to move files back and forth between the 2 operating systems. These discussions sure don't sound like 2017 is that product.I'm in the same boat, I love my Quicken 2007 and can't find anything better! When Apple killed off the emulator, which killed my Quicken 2007, I found a Virtual Machine program that let me run the old MacOS with quicken inside. I don't know who the Quicken owner is now but it looks like history is repeating and this time I'd like to get away from Quicken unless they can release a suitable program. Finally after 18 months or so they released the fix for 2007 which has worked until now. All Intuit would do is release Essentials which was no good. I kept one computer on the older processor and tried a bunch of programs like Money and Mint etc. I went thru this back before Intuit finally fixed 2007 so it would wok on the Intel processor. Instead they take our money on these ridiculous substitutes that don't work. You would think in ten years Intuit or whoever Quicken is now would have had time to put together a program like 2007 that is 64 bit.