No, you don't need to modify your vehicle at all. SideDisplay works through Tesla's built-in web browser. You can wirelessly extend your MacBook screen to the Tesla display without any cables, adapters, or physical modifications.
Because your MacBook's Wi-Fi needs to be used for Internet Sharing. If you tether your iPhone via Wi-Fi, your MacBook's Wi-Fi will be occupied by the iPhone connection and won't be able to share Wi-Fi to your Tesla. By receiving the iPhone's internet via USB cable, your MacBook's Wi-Fi remains available for Internet Sharing to connect with your Tesla.
SideDisplay modifies your Mac's network settings in two stages to establish a connection with Tesla.
- Network connection setup — Configures the network so Tesla can connect to your Mac.
- Domain access setup — Enables easy access via the address
go.ssfrom Tesla's browser.
Each stage can only proceed after the previous one has completed successfully, so they cannot be combined into a single request. This is why macOS asks for your administrator password at each stage.
Yes, it's possible. However, Tesla is known to be unable to connect via Private Address Spaces defined in RFC 1918 (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16). So it will work if you can configure your wireless router's network range to a different address space.
Also, note that latency may increase depending on the router's performance.
Yes, you can. After launching the SideDisplay app, change the port number to your desired value and click Start to connect on that port.
Note that when accessing from the Tesla Web Browser, you'll need to append the port number to the address. For example, if you changed the port to 8080, navigate to http://go.ss:8080.
Please quit the app and relaunch it.
Each device requires its own license. If you'd like to use your license on a different device, you can either purchase an additional license, or deactivate the license on the current device by launching the app and selecting Deactivate, then use that license on another device.
Tesla checks whether internet access is available when connecting to Wi-Fi and refuses to connect to wireless routers that don't provide internet access. Therefore, your MacBook's Internet Sharing must be able to provide internet connectivity.
After enabling Internet Sharing, make sure the Wi-Fi icon in the Menu Bar has changed to the Internet Sharing icon 
.
Yes. SideDisplay works with any device that has a WebRTC-compatible browser. Simply connect your iPad or laptop to the Wi-Fi network created by your Mac's Internet Sharing, then navigate to the connection URL in the browser. The setup process is the same as with a Tesla.
Yes. The reason SideDisplay uses iPhone USB Tethering is to free up your Mac's Wi-Fi for Internet Sharing. Any wired internet connection to your Mac will work as an alternative.
For example, if you have a USB Ethernet adapter, you can connect your Mac to the internet through it, then set Internet Sharing to share from the USB Ethernet adapter over Wi-Fi. The key requirement is that your Mac's Wi-Fi is available for Internet Sharing — however you get your Mac online through a wired connection is up to you.
This happens because your firewall is blocking incoming connections. Go to System Settings > Network > Firewall > Options and turn off the "Block all incoming connections" toggle.