I have a MacBook Air that I accidentally deleted software

Saul919 Said:

“I have a macbook air that i acidentaly deleted a soft ware”

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Which Software?:

If you lost software, contact the developer, asking them for a new license key. The developer, you could probably find by googling its name. For example: If you lost Adobe Photoshop, you’d contact Adobe.

Or, restore from a backup. You’d lose what’s on there now. So, to skip that, contacting the developer would be more ideal.

Start up from macOS Recovery

To start up from macOS Recovery, turn on your Mac and immediately press and hold ...

Command (⌘)-R

Installs the latest macOS that was installed on your Mac.