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The first term refers to a diagnostic startup mode in macOS; the second one signifies the process of forcing an Apple computer into the mode. Mac users often use the two terms interchangeably, while meaning the same mode. As for Safe Mode itself, it is a booting mode that allows a Mac to perform with the small number of kernel extensions and preferences as a way of isolating and troubleshooting performance issues. When you turn on the mode it will perform a directory check, remove all font caches and the dynamic loader cache, as well as, disable all login items. The latter is especially important because startup items running on a computer can substantially slow it down.
The purpose of Safe Mode is to make your Mac work while consuming the minimum of system resources. Can you do basic tasks in Safe Mode? Yes, absolutely. Use Safe Mode to troubleshoot performance issues and test your computer. It might also be the case that the issue occurs due to third-party apps or services.
By booting your computer in this mode, you can delete the rogue app that is causing problems. You can also remove login items or repair disk permissions in the mode.
1. Try Safe Mode
If you have encountered some problems during OS X update, use the mode to reinstall the OS while leaving your personal data untouched. You can also run your Mac in Safe Mode by using the command line. To enter Safe Mode, enter the following command on your iMac:. Note that the command must be entered verbatim. When you are done troubleshooting the computer, use this command to disable Safe Mode:. Try entering the command line from the previous subsection of the article in the Terminal app.
There are no other ways to restart Mac in Safe Mode. The fix lies in security settings of Mac OS X.
Fixing a Mac That Keeps Booting Into Safe Mode
I switched out the keyboard and everything worked fine, so tipped the original keyboard over and gently rapped it on the desk. Took some compressed air to the board and now it seems to work fine. It would be useful to know what the explanation is for the various very useful tips above are for.
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For instance, How to always boot in verbose mode, boot keys for mac OS system start. This is not a complaint just something I would like to know. Perhaps I will write a revised boot key modifier article that is relevant to the newest hardware and macOS releases. Name required. Mail will not be published required.
7 Mac Startup Options Every OS X User Should Know
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