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"This installer can't be opened because Apple cannot check it for malicious software"

Starting in macOS 10.15 Catalina you may see the following message when trying to run a software installer package:

Screen_Shot_2019-10-08_at_16.16.53.pngTo get around this warning, right-click (or ctrl+click) on the installer and select "Open":

Screen_Shot_2019-10-08_at_16.20.20.png

You'll then see the same warning notice again, however this time there will be an additional "Open" button that you can click to run the installer:

Screen_Shot_2019-10-08_at_16.21.55.png

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