There's a page of online Help for QMac about updating of share prices, but I don't know how to use the information it presents.
https://info.quicken.com/mac/updating-share-prices
I do see in QMac the Preference to automatically download share prices every 60 minutes, and I have that disabled.
But I can't tell if QMac also always downloads quotes every time you do an Update, or if this can be disabled entirely, nor if this happens every time you update any account, or only if you do a general update of all accounts.
I reported an issue in the Windows forums, where QMac (using Quicken Connect) got up-to-date share prices for Fidelity funds and stocks, while QWin (over EWC+) did not. On QWin, I had not selected the OSU Online services option to Download quotes. Once I enabled the download option, QWin's prices were updated. The implication is that QMac was downloading online quotes, while QWin was not. But I don't know when that happens on QMac or how it can be controlled.
The Help page describes a method of manually trigger the download of quotes, and it seems to be referring to some other version of Quicken. It refers to an Update Quote button "in any Portfolio View above the transaction list" (which seems to be a contradiction as the portfolio and transactions are on separate tabs). It also says to click the Investing tab, but I don't know what that is referring to. There is a lone checkbox in Window > Securities to "Download quotes only for Watchlist, indexes and securities held" and I don't know what that even means - it's ambiguous. If unchecked, does it mean it will download even MORE quotes than those (like for securities no longer held, and possibly for other things I don't know about)? And that implies that you really have no choice whether or not to download some set of quotes.
Besides toggling the automatic download every 60 minutes, how do you control downloading of quotes on QMac?