1. Reboot Mac Os In Safe Mode
2. Safe Mode Mac Startup
3. Safe Boot Mac Os X
4. Reboot Safe Mode Mac Os
5. Safe Mode Mac Os X
6. Safe Mode Mac Os Mojave
7. How To Boot Into Safe Mode Mac Os X

Reasons to start your Mac in Safe Mode

Mac's Safe Mode minimizes the applications you have available on your Mac to help identify where any issues might be coming from. Starting up your computer and making it run in Safe Mode is also known as a safe boot (safe boot is how your Mac starts, Safe Mode is how it runs).

Mac OS X safe mode performs certain checks, such as verifying the startup disk, repairing directory problems, and loading the necessary kernel extensions. In addition, Mac safe mode prevents Startup items and login items from opening automatically. OS X safe mode also disables user installed fonts. How To Start Mac In Safe Mode. To enter Safe Mode on your Mac computer, press and hold the Shift key as it boots up. In Windows 10 and Windows 8, you can hold Shift and click Restart to open the Troubleshooting menu and select Safe Mode. For Windows 7 and earlier, press and hold F8 while the computer is booting to open the Advanced Boot Options menu and select Safe Mode.

Booting in Safe Mode doesn’t just restrict your applications: A safe boot also checks through your startup drive to make sure there are no problems there.

A fault in your system (like corrupted boot sector) might be preventing you from using your Mac at all. By booting in Safe Mode, your Mac can work with macOS core processes to get back into the system and identify problems, such as floating extensions or rogue applications, that you can then remove.

What happens in Safe Mode

When your computer is prompted to perform a safe boot, it will perform a number of tasks before you can use it, which include:

• A directory check of the startup drive;
• Running on only the bare minimum of necessary kernel extensions;
• Disabling all startup or login applications;
• Deleting the dynamic loader cache, which can help fix blue screen freeze on startup (OS X 10.5.6 or later);
• Disabling all fonts that are not supplied by Apple and moving all font caches to the Trash.

Troubleshooting in Safe Mode

Once your Mac is running in Safe Mode, some applications will no longer be available. If your Mac is working fine in Safe Mode, then it’s likely that one of the restricted applications is responsible for the issues. You can manage the list of startup applications manually, removing the potential buggy apps one at a time to see if it affects the performance.
Open Apple Menu > System Preferences
Click Users & Groups icon
Choose your username, then click Login items
Use [-] sign to remove startup items

There is still a problem though. Manually deleting problem applications still leaves their traces deep in the system, so it’s best to use a dedicated Mac cleanup software like CleanMyMac X to double check your Mac is clear of any problematic files.

Run chrome from terminal mac. If your Mac continues to run into difficulties even in Safe Mode, you may need to use Mac’s native recovery tool, Disk Utility.

Identifying the problem

Here is a list of most common system issues Mac users encounter when their Mac isn’t running at peak performance:

• Corrupted startup files or login applications
• Software conflicts
• Damaged hardware
• Too many apps running, or too much junk cluttering up your disk

To diagnose your Mac more precisely, we recommend performing a full scan with some dedicated Mac cleaning app. As described above, CleanMyMac is our favorite (you can download this app here for free). This app made by the guys from MacPaw sports a handy Dashboard, with hardware health monitors among others, which should give you a clue as to what’s wrong with your system.

Reboot Mac Os In Safe Mode

How to start your Mac in Safe Mode

To restart your Mac in Safe Mode, begin with your Mac switched off or restart it.

1) As soon as your Mac switches on and lights up, press and hold the Shift key.

2) Release the Shift key as soon as the login window appears.

That’s it, your Mac has now been booted in safe mode. Note that it may take longer than usual to boot your computer: This is because there are several checks being performed before it’s ready to use.

If you don’t trust your Mac to turn off and on again without further complications, or for some other reason you would prefer not to safe boot from the startup screen, there is an alternative using the Terminal application.

1) Locate Terminal: Applications > Utilities > Terminal.

2) In the Terminal command line, type the following code and then press Enter:

sudo nvram boot –arg=”-x”

3) You will be asked to enter your password to authorize.

4) Your Mac will now reboot in safe mode. You will not have to hold the Shift key when the computer restarts, simply log in when prompted.

Running your Mac in Safe Mode

If you’re not sure whether your safe boot was successful, there are a couple of ways you can check.

Safe Mode Mac Startup

• ‘Safe Mode’ will appear in red in the menu bar

• The boot mode will be listed as ‘Safe Mode’ (instead of ‘Normal’). To find your boot mode, click on the Apple logo in the menu (top left) and select This Mac. Choose System Report, then Software, and from there you will be able to see whether you are in normal or safe mode.

• Your performance speed will change. Typically macOS will run slower when it is in Safe Mode due to the reduced processes, but if you have noticed some serious lagging this may be improved by the faulty applications being restricted.

Working in Safe Mode

Running your macOS in Safe Mode is normally used to troubleshoot glitches that you have noticed, such as lag, crashing, or spontaneous closures of applications. You should try to use your Mac as you normally do so that you can see if the issues have disappeared in Safe Mode or are still there.

You will find that some features aren’t available, such as third-party fonts, the DVD player, and audio in/out devices, which may limit how productive you can be, so it’s best to identify the fault in Safe Mode, fix it, and return to normal mode to work as usual.

Exiting Safe Mode

Once you’re finished in Safe Mode, simply restart your Mac. It should then reboot as normal, hopefully with improved performance.

If you’re using Terminal commands to return to normal, type

sudo nvram boot-args='

It may take a little longer than usual to shut down from safe mode, but don’t become impatient and use the power button to force a hard shut down.

Booting in Safe Mode Unprompted

If your Mac automatically enters Safe Mode itself without you pressing shift or using the Terminal, don’t panic. Your Mac may have detected an issue that it thinks needs repairing in Safe Mode. If this happens only once, then great, your Mac did its job and cleaned up the issue before it could cause any more problems.

If your Mac is stuck restarting in a Safe Mode loop, try entering another startup configuration, the Recovery Mode, by pressing Command (?) + R upon startup. This will perform a Disk Utility scan to check for issues, and, if that doesn’t work and you have backed up your files, you can try a reinstalling a clean copy of macOS to start fresh.

Safe Boot Mac Os X

Tip: Check your keyboard is clean and that there is no debris beneath the keys. If the shift key has become stuck, your Mac will think it’s being pressed during startup to initiate a safe boot.

Safe Mode limitations

Fashion design sketches online. Unfortunately, the responsibility to locate software issues still resides with the user in Safe Mode. A safe boot will check for disk problems, but if it fails to turn anything up you may be resigned to shifting through your applications list to see what might be causing the problem.

Luckily, some helpful maintenance utilities can be run while in Safe Mode. CleanMyMac X is one of those so check it out. It clears through your junk before it can impact on your system, but if your macOS is starting to lag it might be time to perform a full clean-out of those unused applications. With an average of 62GB of junk cleaned from an average Mac, it's maybe just the tool you need to put your Mac back on track.

$300 for a new 12' PB logic board? More like $600 plus ~$200 labour, if you're lucky.

Reboot Safe Mode Mac Os

$300 for a new 12' PB logic board? More like $600 plus ~$200 labour, if you're lucky.

Apple offers a flat rate mail-in repair service for portable computers in the US. The cost ballparks around the $300 listed by the original poster.

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standing on the shoulders of giants

Last christmas my 12' g4 died of a similar problem the bill came to ~$325 to have the laptop shipped to them repaired and sent back to the apple store in which I went to see if they could fix it.
I bought a mac mini, used target disk mode to backup all my data, and told them that it was okay for a hard drive wipe.
I told them i had 10.4 installed on it that was my only big annoyance as they reinstalled 10.3 instead. It wasn't that hard to upgrade it again.
---
I thought once I was found but it was only a dream

I used this site before for various laptop repairs.
http://www.macservice.com/powerbookg412.html
Try them out :)

Starting up in Safe Boot mode doesn't bypass the VRAM--the VRAM is a set of chips containing the Mac's video image, and if these chips were bypassed, you'd see nothing onscreen. Safe Boot doesn't let some extensions load, which activate specific extended functions of various chips, including some function controlled by circuitry that's damaged in your friend's Powerbook. The 'troublemaking' extension may be one of the ATI extensions at System/Library/Extensions; when it loads, it encounters an unexpected hardware fault, which prevents OS X startup from proceeding. So, if you want to start up the Powerbook without turning off all the extensions that Safe Boot mode turns off, use a process of elimination to find the specific extension that's causing the trouble, and move it out of System/Library/Extensions--first drag one of them out, restart, see if the problem still exists, and if it does, restart in Safe Boot mode, drag the next ATI extension out, restart, etc. Once you've found the troublemaker, drag the other extensions you removed, back into System/Library/Extensions, then repair permissions (since moving extensions out of, then back into, this location will mess up their permissions).
When you remove some video-related extensions out of System/Library/Extensions, you may find a few video-related things don't work properly, if at all, like DVD Player--you may get an error like 'A valid video device could not be found for playback. [-70017].'. You can try VLC to play DVDs, but you may find most frames drop; same with Quicktime.

To potentially speed this process up, startup in verbose mode by holding command-v on startup (or view the system logs after a failed start). You can often figure out what driver or hardware is causing the problem by noting the last item listed before the system fails.

Safe Mode Mac Os X

Agreed, but note that all 12' PowerBooks had Nvidia GPUs, so you'd want to look at the GeForce and/or NVDA kexts.

Safe Mode Mac Os Mojave

My shop would probably charge around 400$ for such a repair on average.
Althought your getting a VRAM error; the problem is most likely related to the graphics drivers in general kicking in; removing the relevant kext files will get your other system functions up and running minus graphics acceleration. . . .maybe. this is not a common usage scenario.
my recommendation? Betterzip. Go find a used PBG412 or ibook on ebay. or do the repair; dealing with this issue is going to be a pain in the ***.

How To Boot Into Safe Mode Mac Os X

Rodney, this is a brilliant hint, thanks! I've got the same problem with my G4 and this tip really helped. Is there any chance you or any of the other big brains out there might know how to turn on sound in safe mode?