Use a different cable and check if the alert disappears. Then, plug your monitor back in, connect it to your Mac and check if the “No Signal” alert is still there.Īdditionally, check your cable and make sure it’s not frayed or faulty. Wait for two minutes to get rid of flea power. You need to unplug your monitor’s power cable, don’t just power cycle it using the On/Off button. Remove the USB-C or HMDI cable and unplug your monitor. Delete All WindowServer Files in Safe Modeįix “No Signal” Alert After Upgrading to macOS Monterey Unplug Your Monitorĭisconnect your external monitor and check if resetting the connection solves the problem.Fix “No Signal” Alert After Upgrading to macOS Monterey.Note: Ars Technica may earn compensation for sales from links on this post through affiliate programs. This redesign also saw Apple reintroduce the SD card slot, which was omitted in the last major MacBook Pro redesign in 2016. It just might cost more money to achieve, and the HDMI port might feel vestigial and useless to a lot of people in four or five years.īefore this week's update to the MacBook Pro line, Apple went several years without offering HDMI ports on MacBook Pro computers at all, instead using only Thunderbolt. So if you want to connect the new MacBook Pro to a high-end display, no one's stopping you. And the new MacBook Pro itself has a variable refresh rate screen that often refreshes at 120 Hz. Of course, Hz is still achievable via the Thunderbolt port, and there are Thunderbolt-to-HDMI and Thunderbolt-to-DisplayPort adapters that will help users sidestep the issue. The limitation could become frustrating for a much broader range of users sometime in the lifetime of a new MacBook Pro purchased today. So while this is an edge-case problem for only certain users with ultra-high-end displays right now, that won't always be the case.

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