How to Screenshot on Mac: A Comprehensive Guide
Learn how to screenshot on Mac with shortcuts for the full screen, an area, or a window, plus the Screenshot app, clipboard, editing, and save-location tips.
If a trusted .command script triggers “File could not be executed because you do not have appropriate access privileges,” it usually needs the execute permission. In Terminal, add that permission for your account with chmod u+x, then run the script again. This changes the file’s permission bit; it does not verify the script or bypass macOS security checks, so inspect the file and trust its source before running it.
Make sure the file really ends in .command and that you know where it came from. A command script can run Terminal commands with your account’s access. If you did not expect the file or cannot verify its source, do not run it. Open it in a text editor to review its contents or get a clean copy from the developer.
Finder’s Get Info window is useful for checking a filename and general sharing permissions, but it does not provide a simple control for adding the shell execute bit to a script. Apple documents chmod as the Terminal method for making a shell script executable in its Terminal User Guide.

script.command, enter this command and press Return:
chmod u+x "$HOME/Downloads/script.command"
Replace the example location and filename with the actual path. Keep the path inside quotation marks, especially if a folder or filename contains spaces. You can also type chmod u+x (including the final space) and drag the file from Finder into the Terminal window to insert its path. Do not type the words “path to file” literally.
The command normally returns to a prompt without printing a success message. u means the file’s owner, and +x adds permission to execute it. This is narrower than making the script executable for every account on the Mac. It should not require an administrator password when you own the file and can change its permissions.
cd "$HOME/Downloads"
./script.command
You can also double-click the file in Finder after changing its permission. Running it from Terminal is useful because you can read any error message or output. If macOS displays a warning when you paste a command into Terminal, read the warning before proceeding.
To see the file’s permissions, run:
ls -l "$HOME/Downloads/script.command"
When the current account owns the file and execute permission is set, the first permission group should include an x, such as -rwx. Apple’s Mac permissions guide explains how file and folder access differs among users.

sudo as a first step.Do not use chmod a+x unless you intentionally want other local accounts to have execute permission, and avoid broad commands such as chmod -R or changing permissions across system folders. To undo the execute bit you added for your account, run chmod u-x "$HOME/Downloads/script.command".
For an app verification alert, follow Apple’s guidance for safely opening apps only when you have confirmed the app is from a trustworthy source. Do not override a warning that says software will damage your computer or that macOS detected malware. Apple also documents newer Terminal paste protections in its Terminal and script protections guide.
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