macOS Sierra: Troubleshooting Mac Auto Unlock With Apple Watch
In macOS Sierra Apple added a feature that lets you use your Apple Watch to automatically unlock your Mac. But Mac Geek Gab listener John was having trouble with Mac auto unlock. Here’s what he figured out.
Device Requirements
In order to use this feature your devices need to meet a couple of requirements:
- Apple Watch running watchOS 3 or later
- Mid-2013 or newer Mac running macOS Sierra 10.2 or newer
You also need to set up two-factor authentication for your Apple ID. The Mac Observer has a guide to set it up. Make sure you sign into your Watch and Mac with the same ID. Next, Apple says that your Mac can’t be using Internet Sharing or screen sharing. To make sure, go to System Preferences > Sharing.
So here’s what happened with John. To use Mac auto unlock both Bluetooth and Wi-Fi need to be turned on, and he forgot to do this.
Other Troubleshooting
Other Mac Geek Gab listeners wrote in with some solutions as well, in case you still can’t use auto unlock, such as restoring the watch from iCloud. Another tip that is a bit more involved is checking the signal-to-noise ratio between your watch and Mac.
Listener Dominic said that he used software called iStumbler on his Mac Mini. He found that the signal-to-noise ratio on his 2.4GHz Wi-Fi was only 12dB. This is usable but should be better. It turns out that an external white-box USB3 SSD enclosure was the problem.
Related
After he moved the enclosure away from the Mini and away from the Wi-Fi antennae, his signal-to-noise ratio increased to a much better 36dB and allowed Mac auto unlock to work perfectly.
To find your signal-to-noise ratio, option-click the Wi-Fi icon in the menu bar. Look for the RSSI number, which is the decibel level.
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