Try restarting the computer. Then try launching the app. After launching the app, check System Preferences Security tab again. I had a similar issue installing some Intel software which required a driver/extension. After the reboot the software just worked.
Visit our official website and click on either of the 'Download BlueStacks 4' buttons, as shown below. The BlueStacks Installer will now automatically begin to download. Once it gets downloaded onto your Mac, double-click on it. The BlueStacks Installer will now open. Here, double-click on the BlueStacks icon to begin the installation. I got BlueStacks successfully installed on Catalina build '10.15 Beta (19A487l)' tonight. There were several steps involved. Step 1 was disabling Gatekeeper. From the terminal: sudo spctl -master-disable. Then install Bluesacks from the dmg file.
:max_bytes(150000):strip_icc()/ScreenShot2020-12-30at5.40.38PM-0335acb2aefa4db0b9263fdd81dbcf8c.png "Catalina")
Bluestacks Catalina Full
If you are running macOS 10.15 Catalina, then maybe the software isn't compatible or some new Catalina security feature is blocking it. I haven't used Catalina yet, so I cannot advise you further on it.
You may need to contact the publisher or developer of the software for assistance.
Bluestacks Catalina Update
Bluestacks Para Mac Catalina
Oct 20, 2019 6:51 PM