![]() Some antivirus software may mistakenly flag the Postman installation file as malicious.Ensure you have administrative rights or contact your system administrator. Lack of administrative privileges may cause installation errors on Windows.Ensure you have the required free space on your computer or laptop. Insufficient disk space can prevent the installation process from completing.Follow the same steps as above to open the application. This error can occur when the Gatekeeper security feature only allows applications downloaded from the App Store. Postman.app can’t be opened because it was not downloaded from the App Store.To bypass this, right-click on the Postman.app file, select Open, and confirm the action in the prompt. This error occurs due to security settings preventing the installation of applications from unidentified developers. Postman can’t be opened because it is from an unidentified developer. ![]() Re-download the Postman installation file and attempt the extraction again.
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