My 13" 2012 MacBook pro does not stay in clamshell mode. It worked initially when I set it up, didn't make any changes and all the sudden it just stopped working. I ensured that my external mac keyboard and mouse are fully charged and laptop is plugged in to power. Display settings are on mirror and monitor on single input mode. Please help, to use my monitor I have to have the laptop partially open.
Check if you have same issue in safe mode: How to use safe mode on your Mac - Apple Support (Takes Longer to boot)
See if Reset NVRAM or PRAM on your Mac - Apple Support helps.
Note: Safe mode prevents your Mac from loading certain software as it starts up, including login items, system extensions not required by macOS, and fonts not installed by macOS. It also does a basic check of your startup disk, similar to using First Aid in Disk Utility. And it deletes some system caches, including font caches and the kernel cache, which are automatically created again as needed.
Check if you have same issue in safe mode: How to use safe mode on your Mac - Apple Support (Takes Longer to boot)
See if Reset NVRAM or PRAM on your Mac - Apple Support helps.
Note: Safe mode prevents your Mac from loading certain software as it starts up, including login items, system extensions not required by macOS, and fonts not installed by macOS. It also does a basic check of your startup disk, similar to using First Aid in Disk Utility. And it deletes some system caches, including font caches and the kernel cache, which are automatically created again as needed.
I have a MacBook Air M1 and using a Satechi TYPE-C MULTI-PORT ADAPTER 4K WITH ETHERNET V2 connected to a Samsung 32" monitor via HDMI. I've tried most of the suggested fixes like Apple tech support as well as others online. I'm still waiting on a response from Satechi but suspect their adapter doesn't support clamshell at this time. I've since gone to the Apple store the get one of their USB-C Digital AV Multiport Adapters. I'll run this through it's paces and report on if it works and also if I get a response from Satechi.
Jd
So the Tech from Satechi seemed to believe the HDMI might be a problem and I was to see if I could return it to my authorized seller where I bought it. When I took it back for a refund the sales guy said the it's a known issue that clamshell mode and the Satechi products. I messaged the Satechi Tech back saying it's disappointing and I was able to get a refund.
I'd advise not to buy one of these until Satechi say it's fixed.
Unfortunately I can't leave a review on Satechi site to warn people of this as I didn't buy it through the website. :-(
Jd
If anyone has any insights into how to disable or break clamshell mode please contact me. I hate it. I send feedback to apple on a weekly basis asking for a checkbox in settings to disable it.
Clamshell mode not working on the MACBOOK PRO 14"
Why can't we use Clamshell mode with M1 Macs? Will this be corrected anytime soon?
Why Clamshell mode is not working?
