Deal with more se­ri­ous is­sues

When macOS won’t start, is un­sta­ble, or for­gets hard­ware set­tings, try these tips

Mac Format - - FEATURE -

Start in safe mode

When your Mac won’t start up or be­haves

oddly, there are many pos­si­ble causes. Safe mode helps you nar­row them down. It loads only es­sen­tial ker­nel ex­ten­sions, dis­ables fonts you’ve in­stalled in case any are cor­rupt, deletes var­i­ous cached (tem­po­rary) files, and pre­vents startup and lo­gin items from open­ing.

See be­low for our quick guide to us­ing safe mode to rule out your lo­gin items as the cause of startup prob­lems. If you still have prob­lems af­ter that, a ker­nel ex­ten­sion (kext) could be the cul­prit. Don’t try to re­move these man­u­ally; the safe way is to use an unin­staller pro­vided with their as­so­ci­ated app. To see which third-party kexts are in­stalled – prob­a­bly very few – open Ter­mi­nal and type kext­stat | grep -v com.

ap­ple. Look over the out­put; most kexts give away their app’s iden­tity. Any called ‘tun’ and ‘tap’ will be for a VPN (vir­tual pri­vate net­work). Use Google to look up any that are mysterious.

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