Is your Mac old enough to have an optical drive? Holding C while your computer boots forces macOS to ignore your startup volume in favor of bootable optical media instead.
Trying to boot from the wrong optical volume? This allows companies to customize macOS to their liking and create custom images for specific users, then deploy it network-wide without modifying every machine. If you have set your Mac to login automatically, you can tell it to ignore this setting by holding Left Shift after the boot screen a white Apple logo and progress bar appears. Want to stop all your login items and previous session windows from opening on launch? When you get to the login screen, enter your password as normal then click on the Log In button or hit Enter.
Immediately press and hold the Shift key while your Mac logs in and boots up. Read More , and we recommend that you learn them now so you can rely on them when you really need them. Your email address will not be published. This is a brilliant article.. I had awful trouble after installing an NTFS driver that made my macbook pro unusable..
With the info here I was able to disable to boot into the machine and disable the driver and remove it. Thank you very much for this. Rob Nightingale.
Booted Into Safe Mode, but external USB H… - Apple Community
Top Deals. Email Facebook Whatsapp Pinterest Twitter. Enjoyed this article? Skip to main content. Click the Apple logo and select "Restart. Click "Restart" to confirm you want to reboot your computer. Hold down the "Option" key until you see the Startup Manager.
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Press the right or left arrow keys on the keyboard to select the USB drive. Press the Enter key to boot from the USB drive.
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No third party kernel extensions will boot, login items are skipped, and it empties certain caches. To boot into Safe mode: Turn your computer off, then press and hold the Shift key while your computer boots.
How Can I Repair My Hard Drive If My Mac Won't Start?
If your computer has hung on boot, shut it down by holding the power button until the machine switches off around 10 seconds first. Should your computer boot properly, try restarting and booting as normal. You can then restart into Safe mode, remove the problem extension, and try again. Every Mac ships with Recovery mode, which lives on a separate partition on the startup disk. Later you also may want to restore it.
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Here's how to do both. Keep in mind this requires an internet connection and will take a lot longer, since macOS needs to download the image first. Select it from the list on the left, then click First Aid followed by Run.
File system consistency check or fsck for short is a longstanding Unix tool for checking and fixing drive problems. Depending on the size of your volume, the type of drive you have installed, and the potential problem, fsck can take a while to complete. Patience and persistence is important if you want to fix your drive this way. Gonna be a bad weekend, as this is not what a Mac is supposed to look like during boot. This boot mode allows you to make changes to shared user resources.
You can type fsck -fy to run fsck.
If you have a firmware password set on your Mac, Single User mode is not available to you. If you interrupt the process while it is making changes to your drive, you may incur data loss.