In the latest Mac systems it also is quite secure and cannot be easily circumvented by changing hardware configurations like RAM, so this will provide a good lock for the system's hardware. Disk locks provide a step up of security for many applications. Our LockAmerica locks include many advanced feature offerings reflecting extra quality and security, from cylinder locks, dimple keys, shielded steel shackles, to a larger number of potential combinations reducing the risks posed by cheap locks that reuse a small group of key combinations.
Go to Disk Utility - Erase Disk - Select Erase with Journaling. Locked hard drive can't reinstall Lion OSX. @danj also suggested in this solution to create a separate bootable thumb drive to reinstall OS X from, erase the disk using Disk Utility, and that apparently solve the issue. How to reset a password from the login screen 1. Boot the Mac to the login screen. There are two keyboard shortcuts that effectively lock your Mac: Use Control-Shift-Power to lock your MacBook. (For older MacBooks with an optical drive, use Control-Shift-Eject.).Note
The following commands only work in versions of Windows earlier than Windows XP. To lock or unlock a hard drive in Windows XP or later versions of Windows, use BitLocker or a third-party software program designed for locking and unlocking drives.
Macbook Pro Disk Is Locked
You need to open a command prompt window to unlock or lock the hard drive. In Windows, click the Start and enter cmd in the Search field, then press the Enter key.
To unlock the hard drive
The x represents the letter of the hard drive that you want to unlock. For example, if you needed to unlock the C: drive, you would type unlock c:
To lock the hard drive
Mac Os Disk Locked
The x represents the letter of the hard drive that you want to lock. For example, if you needed to lock the C: drive, you would type lock c: at the command prompt.
- See our lock and unlock page for further information and related links on these commands.