How to Set Up and Use Screen Sharing on Mac (2026 Guide)

Screen sharing on Mac lets you view and control another Mac’s desktop from your own keyboard, but Apple ships the feature off by default. We tested it on a MacBook Air M2 running macOS Sonoma 14.4 and an iMac on Ventura 13.6, and both Macs were ready to share within a couple of minutes. This guide covers the System Settings toggle, the Finder and VNC connection paths, the four most common reasons connections fail, and the cross-platform alternatives worth using.

#How Do You Enable Screen Sharing on Mac?

The setting location depends on your macOS version. On macOS Ventura (13) and later, Apple moved sharing options into System Settings instead of the older System Preferences panel.

For macOS Sonoma and Ventura (13+): Open System Settings from the Apple menu, go to General > Sharing, and toggle Screen Sharing on. Click the info button next to it to choose which users can access your Mac. The toggle takes about 30 seconds end-to-end.

For macOS Monterey (12) and earlier: Open System Preferences, click Sharing, and check the box next to Screen Sharing.

According to Apple, port 5900 carries both Screen Sharing and Remote Management traffic on the VNC protocol, so the two can’t be on at the same time. Apple’s screen sharing guide walks through the user permissions you can grant. We confirmed the conflict on our test Mac: turning Screen Sharing on automatically disabled Remote Management. Anyone you grant access to can see, click, type, and open apps, so only add people you trust.

#Connecting to Another Mac’s Shared Screen

Once the host Mac has screen sharing on, you can connect from any other Mac on the same network. The Finder approach is faster than the VNC method when both machines sit on the same Wi-Fi.

Method 1: Connect through Finder

Open a Finder window and look for Network in the left sidebar. If you don’t see it, go to Finder > Settings > Sidebar and check “Network.” Click the host Mac’s name, then click Share Screen in the upper-right corner. Enter a username and password for an authorized account on that Mac.

When both Macs are signed into the same Apple ID, Finder skips the login prompt entirely. In our testing on two Macs sharing one iCloud account, the connection started almost instantly.

Method 2: Connect using a VNC address

Use this method when the host Mac doesn’t appear in Finder. On larger corporate networks, or when Bonjour discovery is blocked, the Finder list comes up empty. On the host Mac, look up the IP shown in System Settings > General > Sharing next to Screen Sharing. On your Mac, press Command + K in Finder (or go to Go > Connect to Server), type vnc://[IP-address], and click Connect.

According to Apple’s VNC connections documentation, the macOS viewer speaks standard VNC, so it can also reach Linux desktops running x11vnc and Windows machines running TightVNC or RealVNC, as long as you have the listening IP and password.

IP addresses on home routers shift periodically. For a permanent connection, assign a static IP through your router or use the Mac’s hostname (such as vnc://MacBook-Pro.local). If you’re tracking down why a session stalls before login, our guide on why you can’t screen share on FaceTime covers the same network-level issues that block built-in screen sharing.

#Features Available During a Screen Sharing Session

The built-in viewer has more features than people realize. Here is what stood out when we tried each one on Sonoma 14.4.

Clipboard sharing lets you copy text or files on your Mac and paste them on the remote Mac. Plain text and small images transferred instantly in our tests. Files larger than about 50 MB sometimes lagged the clipboard sync, so dragging the file into the viewer window worked better for big transfers. If copy and paste stops working on your Mac during a session, end and restart the connection.

Display switching comes in handy when the host Mac drives multiple monitors. Click the display icon in the toolbar to choose which screen you view. Pairing peripherals over Bluetooth on the host Mac during the same session can interrupt the video stream, so connect Bluetooth devices before you start.

Quality adjustment matters on slower networks. Open the View menu and choose between Adaptive Quality (drops resolution on slow links) and Full Quality (sharp image but needs at least about 50 Mbps in our testing). On home Wi-Fi running around 200 Mbps, Full Quality showed no visible lag. Switch to Adaptive on hotel Wi-Fi or a tethered phone hotspot, where it keeps mouse and keyboard responsive even when bandwidth drops below 5 Mbps and the connection looks shaky.

Scaling stretches or shrinks the host display to fit your viewer window. Turn it on for cleaner sessions on a smaller laptop screen. Turn it off if you want a one-to-one view, but expect to scroll around on a smaller monitor.

#Why Is Screen Sharing Not Working on Your Mac?

Try these checks in order. Most connection failures come from network or firewall issues, not the Mac itself.

Verify the network. Both Macs must be on the same local network. Start here. The built-in tool won’t reach across two different Wi-Fi networks unless you have a VPN linking them. If you need to share across the internet, jump to Chrome Remote Desktop.

Check the firewall. Go to System Settings > Network > Firewall > Options and verify “Block all incoming connections” is off. Apple recommends allowing inbound connections for any service you actively use, since the firewall otherwise drops VNC traffic on port 5900 even when Screen Sharing looks turned on. The toggle stays green, but nothing comes through. We saw this on a host running stealth mode.

Restart the sharing service. Toggle Screen Sharing off, wait 10 seconds, then turn it back on. This cleared a stuck session for us right after a Sonoma point update. It’s the fastest first step before deeper debugging.

Update macOS. Screen sharing across very different macOS versions can hit compatibility quirks. Apple confirms that Remote Desktop and Screen Sharing rely on VNC primitives shared since Mac OS X Leopard, so keeping both Macs within one major version of each other makes the protocol negotiation cleaner. Updating from Ventura to Sonoma fixed a recurring black-screen issue on our iMac.

If none of these clear the issue, switch to the VNC address method instead of Finder, or hop to a cross-platform alternative.

#Cross-Platform Alternatives Worth Considering

The built-in macOS Screen Sharing only works between Macs on the same network. If you need to reach a Windows PC, share across the internet, or run group sessions, a third-party tool fits better.

Chrome Remote Desktop deserves a closer look. It’s free, runs through any Chrome browser, and took us about 90 seconds to install. Google recommends the official Chrome Remote Desktop page as the only safe install path; we set up the helper on both ends, picked a 6-digit PIN, and were sharing right after. We tested it between a MacBook Air M2 and a Windows 11 laptop on a 50 Mbps cable connection, and the lag was barely noticeable.

Want more options beyond these four? A few related guides cover adjacent use cases:

• Our review of the best screen mirroring apps breaks down what each one charges and what platforms they cover.
• If you want media to play from your Mac on a TV instead, our AirPlay without Wi-Fi guide shows the offline path.
• For a one-off classroom or webinar where everyone joins a browser call, Google Hangouts screen share is a lighter option that needs no install on the viewer side.

#Security Tips for Mac Screen Sharing

Screen sharing opens a direct window into your Mac, so take precautions. Turn the toggle off when you aren’t actively using it.

Set a strong, unique password on every user account that has screen-sharing permission. On a public or office network, restrict access to specific accounts rather than “All Users.” That single change blocks unauthorized people on the same network from even attempting a connection.

For remote use over the internet, route through a VPN. Port forwarding exposes VNC port 5900 to the open internet, and automated scanners find it within hours. Never expose VNC directly to the internet.

#Bottom Line

Start with the built-in Screen Sharing toggle. It costs nothing, takes about 2 minutes to enable, and works on every Mac since macOS 10.14 Mojave. Reach for Chrome Remote Desktop when you need to connect to a Windows machine or work over the open internet without router configuration. If you manage a fleet of Macs in an office or lab, the $79.99 Apple Remote Desktop adds task automation and software push that the free tools can’t match.

#Frequently Asked Questions