I've had this problem since upgrading to QB Mac Desktop 2019 in November 2019. I am currently running High Sierra as my OS. (I know I am running behind, but I am always cautious on how QB may work with new OS.) It happens randomly and is really disturbing. I have sent numerous bug reports to QB to no avail. It created a huge problem for me at year end when I sent files to a tax accountant and transactions were missing.
Recently I phoned customer support and after a bit of back and forth and checking with, other support personnel, I don't know, I was told, "it's not QuickBooks, it is your operating system". Really! It was always my understanding that software providers provided software that works correctly with an OS! With any software it is not acceptable to say, "it's not us, it's you" - but especially something as critical as accounting software.
If this is of any help to others, I have preferences set to automatically back up the company file when I log out. I have found that if you restore the back-up, the transactions are there. So, I have to assume customer support is correct, it is not QB, but I don't know where the problems is with the OS that the transactions are removed without a trace. It just baffles me, but then again, I am not a software developer and QuickBooks needs to fix this.
Today I decided to research if upgrading to QB Mac Desktop 2020 might have fixed the problem when I found this post, so apparently not. Again - this is NOT acceptable. QuickBooks please fix this problem now, you are losing credibility. I realize the Mac community has never had your highest attention, but come on. How can you put out accounting software of all things, that cannot be relied upon? This is crucial to all businesses. I could lose clients because of this and it would be your fault.
