When opening TurboTax for Mac after installation, you may see the TurboTax checkmark icon bounce a few times before disappearing from the menu bar. This can be accompanied by the error:

TurboTax 2021 can't be opened because Apple cannot check it for malicious software.
Here's how to fix it:
- In the error message, select Show in Finder.
- The Applications folder should open, and your TurboTax 2021 product will be selected. Right click on the TurboTax 2021 product, and select Open.
- A similar error message will appear, again saying, TurboTax 2021 can't be opened because Apple cannot check it for malicious software.
- This time, select Open and TurboTax will properly install and open.