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 iMac to the internet instantlyโno password required.
Note: Personal Hotspot requires an iPhone with iOS 8 (or later) or a cellular-model iPad with iPadOS 13 (or later). See the Apple Support article How to set up a Personal Hotspot on your iPhone or iPad.
Connect to your deviceโs Personal Hotspot. Click the Wi-Fi status icon 
in the menu bar, then click 
next to your iPhone or iPad in the list (if you donโt see the list, click Other Networks). The Wi-Fi icon in the toolbar changes to . You donโt need to do anything on your deviceโiMac 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 iMac disconnects to save battery life.
Learn more. See Use an iPhone or iPad to connect to the Internet in the macOS User Guide.