Instant Hotspot on your Mac
Lost your Wi-Fi connection? With Instant Hotspot, you can use the Personal Hotspot on your iPhone or iPad to connect your MacBook Air to the internet instantlyโno password required.
Note: Personal Hotspot requires an iPhone or cellular-model iPad, with iOS 8 (or later) or iPadOS.
Connect to your deviceโs Personal Hotspot. Click the Wi-Fi status icon 
iโn the menu bar, then choose your iPhone or iPad from the list of devices that appears. The Wi-Fi icon changes to 
. (You donโt need to do anything on your deviceโMacBook Air connects automatically.)
Tip: If youโre asked for a password, make sure your devices are set up correctly. See the Apple Support article Use Instant Hotspot to connect to your Personal Hotspot without entering a password.
Check the status of your connection. Look in the Wi-Fi status menu to see the strength of the cellular signal.
When youโre not using the hotspot, your MacBook Air disconnects to save battery life.
Learn more. See Use an iPhone or iPad to connect to the Internet in the macOS User Guide.