You can use Spotlight (cmd + space bar) to search for "Terminal" or use Finder to navigate to Applications > Utilities > Terminal.
Run the following command in your Terminal to allow downloads from anywhere.
sudo spctl --master-disable
Hit return and enter your password.
You'll need to relaunch System Preferences and navigate to Security & Privacy and click on the General tab.
If necessary, click to lock icon in the bottom left to allow changes.
Then click "Anywhere".
Now you should be able to download whatever you were trying to download before you found this guide!
Starting with a silly and inventive opening that even showed Tim Cook (an almost convincing actor of course) getting out of a Delorean, the Apple Keynote at the WWDC21 (Worldwide Developers Conference 2021), the 32nd annual computer conference, was nothing short of exciting. Because Apple's new product releases tend to be announced during the Fall WWDCs, this Apple keynote did not announce any exciting new products or gadgets to be bought; instead the June 2021 Apple keynote focused on the new iOS, iPadOS, watchOS, and macOS, as well as the new features, apps, and app changes that correspond to these updates. While there are no fun, new Apple products to announce, I am excited to say, it didn't make this Apple keynote any less awesome for Apple users. There are plenty of new features to be released that will have you all pumped about your Apple products and their new capabilities. I have been watching the Apple Keynotes, eagerly awaiting their new product launches, and working with Apple products for years. Some of the new features announced at the WWDC21, are this Apple enthusiast's most anticipated Apple features of all time. So, to put it simply, Apple's keynote at the WWDC21 has my stamp of approval, even if a few of these updated features are long overdue. Let's get into it! Note: Not every new Apple feature is listed in this article. The purpose of this article is to give you an easy-to-read version of an otherwise long event, since I know not everyone has two hours on a Monday to watch the Apple Keynote. Once you've finished checking out the WWDC21 Apple Keynote, check out the highlights from E3 2021