Check your operating system version against the ones I mentioned in the previous post, otherwise, try the following:
Right-click (or ctrl+click) on the installer and select "Open". If you then see the same warning notice again, but with an additional "Open" button, click on it to run the installer.
Can someone point me at a version for PicoScope software for the Mac? I have installed a VM running an earlier version of MacOS so I can run the Beta but I can't find an install file for V6 Beta on the Picotech downloads page.
Just a suggestion to narrow down the problem a bit. If you do not connect a device, the software will offer to use a demo device (a simulation). Try to do the same things you did previously and see if that also triggers a crash. If it does, you can perhaps further narrow down the problem to a specific action since the simulated device is more deterministic than your actual device. If it does not, it might be in the driver. You can subsequently e-mail support with a more detailed description of your problem. Good luck!