macOS Guides

The macOS Application Firewall controls which applications are allowed to accept incoming network connections. It is different from a traditional port-based firewall. Enable the Firewall Go to System Settings > Network > Firewall and toggle it on. Enable Stealth Mode Click Options and enable Enable stealth mode to prevent your Mac from responding to ping requests. Manage App Permissions Under Options, you can allow or block specific applications from accepting incoming connections. sudo…

Too many login items slow down your Mac's boot time. macOS Ventura reorganized startup management under a new System Settings location. View Login Items Go to System Settings > General > Login Items . Here you see apps that open at login and background services. Remove an Item Select the item and click the minus ( - ) button to remove it. Via Terminal osascript -e 'tell application "System Events" to get the name of every login item' To remove an item by name: osascript -e 'tell application "System Events" to…

The Terminal app gives you direct access to the Unix shell underneath macOS. This guide covers the essential commands every Mac user should know. Open Terminal Find it in Applications > Utilities > Terminal or search with Spotlight (Cmd+Space). Essential Commands pwd # Show current directory ls -la # List files with details cd ~/Desktop # Change directory mkdir myfolder # Create a folder cp file.txt backup.txt # Copy a file rm file.txt # Delete a file Customize the Shell macOS uses Zsh by default. Edit ~/.zshrc to…

Time Machine is macOS's built-in backup solution. It automatically backs up your entire Mac to an external drive or a network location. Connect a Backup Drive Connect an external drive with enough space (at least the same size as your Mac's storage). Configure Time Machine Go to System Settings > General > Time Machine , click Add Backup Disk , and select your drive. Manual Backup tmutil startbackup Exclude Folders tmutil addexclusion ~/Downloads

FileVault is the built-in full-disk encryption feature in macOS. It protects all data on your Mac by encrypting it with XTS-AES-128 encryption. Enable FileVault Go to System Settings > Privacy & Security > FileVault and click Turn On . Save the Recovery Key You can store the key with Apple or manage it locally. Store it securely — losing it means losing access to all your data. Check Encryption Progress Encryption happens in the background. Check progress from the same settings panel or via Terminal: fdesetup…