#Boot from usb mac asks for password how to
#Boot from usb mac asks for password Pc

Locate the “Command”, “Option”, “P”, and “R” keys on your Keyboard.

If needed, hold the power key down for several seconds. Sometimes, resetting the PRAM/NVRAM can help get you out of the reboot loop if its is one of these settings or kernel panic information causing the problem. Even the selection of your start up disk is stored here. Your mac stores some settings in the PRAM or NVRAM (for newer Intel Macs). Here’s an additional link that will tell you exactly what Safe Mode actually is and does for you Reset the PRAM / NVRAM

#Boot from usb mac asks for password how to

Here’s a link to the Safe Mode on the Apple Support site (the link gives you an additional option of how to boot into Safe mode if (say) your Shift key on your keyboard isn’t working using Terminal during Start up. If not, try restoring to an earlier OS backup (assuming you use Time Machine, which you should) Verify Disk Permissions –> Repair Disk Permissions –> Verify Disk –> Repair Disk To fix this, in Safe Mode, run Disk Utility, and do the following : If you restart without the Shift key after this, and it goes back into the loop, you can be sure of it. If the system loads properly, then you know that the issue is likely with some third party extension or add-on that you installed. To restart in Safe Mode, hold down “Shift” while the computer restarts immediately AFTER you hear the start up Chime (not Before). Once you know which one is causing the boot loop, you can get the device fixed by the manufacturer maybe. You can shortlist which one it is quickly by simple elimination. If this works, then the problem is with one of the external devices.

Disconnect your Ethernet / LAN cables (if connected).

This could be hard drives, USB hubs, FireWire Cables, etc

Disconnect all the external devices that did NOT come with your mac.

Shut down your computer by holding down the power key for a few seconds.

#Boot from usb mac asks for password Pc

But I’ve had friends who gave their external Hard Disks to some PC users, which when returned caused some library plist or permission to malfunction. This technically shouldn’t come first, because it’s quite likely not to be the problem with the Mac.

How to circumvent this ? One of the following processes should get you out of this loop Disconnect all Peripheral Devices If not, then it could be a add-on causing the problem. If one of these are causing a problem, your reboot should start immediately after the spinning wheel. At this point, the system loads kernel extensions, boot caches and more. Then a spinning wheel shows up underneath. During the boot, when the Apple Logo shows up, that means the System has a valid boot device (ie could be your bootcamp, or your HD, or your bootable HD).

To narrow it down, lets take it one step further. However, if your computer is not booting, but is stuck in a boot loop, then there could be two problems : it could be a kernel issue, or a hardware issue. Once the Kernel loads properly, even if there’s a problem with background services like location, the computer will still boot, only in this case those particular background services may not work. This could be if there was a power outage/fluctuation, an app crashed, you ran out of HD space (yes, that’s happened to me, I download… a lot) or if your system libraries are corrupt. However, in the in some cases, instead of booting properly, the system may display the Apple Logo and then reboot, repeating this step over and over again. When you start up your Mac, the system generally shows a grey Apple Logo (the color changes depending on what OS you’re running) for a brief period followed by your Log In screen or directly jumps to your desktop (again depending on the settings you set in System Preferences). But first let’s look at what’s probably happening in the background. One of the following list should pull you out of the Boot loop, and from there you can take measures to stop it from reoccurring. Now back to the possible solutions/workarounds. I highly recommend going to them (rather than Maple or Chroma) for any Apple Related issues you may face. I’ve had a fantastic journey with them, for over 15 years I think. But there are other ways….įirst off, let me say, that the only Service Provider I’ve seen that doesn’t give up so fast on your data is PCSS, Mahim, Mumbai. Unfortunately, most of the time in India, if you take your Mac to your local Apple Third Party Reseller or Apple Authorized Service Provider, they will tell you that the only way to resolve this is to wipe your hard disk and by doing so you will lose all your data. Maybe its a 3rd Party extension, or or add-on causing it, or maybe a hardware fault. Recently 2-3 friends have had this problem with their Macs.