I wasn’t able to find a tool to resize and center all open windows to a specific size for screen recording, so I came up with this AppleScript:
set windowWidth to 1024
set windowHeight to 768
tell application "Finder"
set {0, 0, screenWidth, screenHeight} to bounds of window of desktop
end tell
tell application "System Events"
set position of windows of (application processes whose visible is true) to {(screenWidth - windowWidth) / 2, (screenHeight - windowHeight) / 2}
set size of windows of (application processes whose visible is true) to {windowWidth, windowHeight}
end tell
which you can save as an “Application” via Automator (built-in macOS app):
Save it to your desktop or any other convenient location. Double-click the app to run it.
Approve the permissions requests for Finder and System Events. In addition, open the “Settings” app and enable the newly created app under the “Accessibility” section:
