Your Mac stores recent DNS lookups in its memory cache. To ensure macOS recognizes your newly added blocks immediately without restarting your computer, you must flush the cache. Run this command in your Terminal window:
Major Adobe Creative Cloud updates occasionally introduce new activation and telemetry domains. After updating any Adobe software, verify your hosts file blocking remains effective:
#!/bin/bash DOMAINS=( "://adobe.com" "://adobegenuine.com" "://adobe.com" ) HOSTS_FILE="/etc/hosts" for domain in "$DOMAINS[@]"; do if ! grep -q "$domain" "$HOSTS_FILE"; then echo "0.0.0.0 $domain" | sudo tee -a "$HOSTS_FILE" > /dev/null echo "Added: $domain" else echo "Already exists: $domain" fi done sudo dscacheutil -flushcache sudo killall -HUP mDNSResponder echo "DNS cache flushed successfully." Use code with caution. To run this script: Save the code to a file named block_adobe.sh . Grant execution permissions: chmod +x block_adobe.sh . hosts file entries to block adobe activation mac better
: While 127.0.0.1 (localhost) points traffic to your local loopback address, using 0.0.0.0 is generally better. 0.0.0.0 is an invalid target that drops the connection instantly, preventing your machine from waiting for an internal timeout or triggering reverse-lookup errors. Step-by-Step Guide to Editing Hosts on Mac
What makes this approach particularly robust is that it works system-wide and persists across application updates and reboots. Unlike blocking via application-specific settings or temporary firewall rules, the hosts file continues working regardless of how an Adobe application attempts to phone home. Your Mac stores recent DNS lookups in its memory cache
: Ensure there is a single space between 127.0.0.1 and the domain name. Do not include http:// or https:// prefixes.
Enter your when prompted (you will not see characters appear as you type). Use the arrow keys to navigate to the bottom of the file. Add the entries listed below. Save the changes by pressing Control + O , then Enter . Exit nano by pressing Control + X . After updating any Adobe software, verify your hosts
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