I am attempting to deploy Slack to our macOS Ventura devices via a curl script. When a user launches the app for the first time, they get a pop-up that says '"Slack" is damaged and can't be opened. you should move it to the Trash. '

This is only occurring in Ventura. If I download the software manually through the same URL I am calling in the curl script and install it normally, it works fine. Is there something new I have to do to get past the gatekeeper in macOS Ventura? This worked in Monterey.

The script in question:

#!/bin/bash
# this is the full URL
url="https://slack.com/ssb/download-osx-universal"
# change directory to /private/tmp to make this the working directory
cd /private/tmp/
# download the installer
/usr/bin/curl -L $url -o slack-desktop-latest.dmg
# mount the dmg
hdiutil attach slack-desktop-latest.dmg -nobrowse
# check if ~/Applications exists and create it if not
DIRECTORY=~/Applications
if [ -d "$DIRECTORY" ]; then
  echo "$DIRECTORY exists"
elif [ ! -d "$DIRECTORY" ]; then
  echo "$DIRECTORY does not exist"
  mkdir $DIRECTORY
# copy app to ~/Applications
cp -rf /Volumes/Slack/Slack.app ~/Applications/
# modify permissions for ~/Applications
chown $3: ~/Applications
chmod u+w ~/Applications
# unmount the dmg and remove the installer
hdiutil detach -force -quiet /Volumes/Slack
/bin/rm -f slack-desktop-latest.dmg
exit 0

This is what I use

#!/bin/sh
/usr/bin/curl -sL "https://slack.com/ssb/download-osx-universal" -o /tmp/slack.dmg
TMPDIR=$(mktemp -d)
hdiutil attach /tmp/slack.dmg -noverify -quiet -nobrowse -mountpoint "${TMPDIR}"
ditto "${TMPDIR}"/Slack.app /Applications/Slack.app
xattr -r -d com.apple.quarantine /Applications/Slack.app
hdiutil eject "${TMPDIR}"
rm /tmp/slack.dmg

Thanks for the replies. We don't use the App Store deployment because of a conflict with a config profile payload. Since we have the "require admin password to install or update apps" payload configured, the slack helper app constantly pops up asking for an admin pw every time slack pushes an update and our users are not admins.  That's also why we install to the user's application folder ( per slack's documentation here ).

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