* using High Sierra on a Parallels VM under Big Sur. There are some operations (like exporting a truncated file) that don't work properly, but luckily I still have some older Macs that I can run QM2007 (& Managing Your Money) natively on, so I resort to them when necessary.
Quicken 2007 definitely has a limit on total transactions; in my last couple years of using it, I ket bumping into "the transaction file is full" messages until I deleted some transactions.As noted above, I believe the file size limit is 65,535, or thereabouts, as 65,536 (2^16) is the maximum value of an unsigned 16-bit integer used for addressing. (I had about 65,000 transactions in my Quicken 2007 file that I transferred to modern Quicken Mac last year.) Splits do not add to the transaction count (e.g a transaction with 10 splits counts as one transaction), but transfers do (they are two linked transactions, not a single transaction in two places).
@kohster When they originally launched the cloud creator, it was for people on Catalina. But after a short time, they switched it to be the way all conversions worked. So even on Mojave, the converter runs through their cloud server. (But I'm curious: why does it matter how the converter works, so long as it works?)...
Thanks for that set of testing.... did you try with a more current version of QMac too, with your current QID?