Many cross platform users realize the data security so that they encrypted external drive with Windows BitLocker to protect their important data. However, a warning message: "The disk you inserted is not readable by this computer" is received after inserting a BitLocker encrypted drive to your Mac.
As we know, BitLocker drive encryption is developed by Microsoft. But Microsoft has not implemented BitLocker for Mac client, so Mac cannot recognize BitLocker drive encryption. It is why you cannot open a BitLocker encrypted drive on your Mac without the 3rd party tool.
With GDPR (General Data Protection Regulation) now in full force, you have to make your drives being encrypted. Windows BitLocker is the most truly secure encryption.
Although Microsoft only released BitLocker for Windows version, but BitLocker is still compatible with Mac using M3 BitLocker Loader for Mac. It makes using BitLocker for Mac a seamless experience.
M3 BitLocker Loader for Mac is a simple-to-use BitLocker for Mac tool. It can open BitLocker drive on Mac and enable to read/write BitLocker drive after supplying the password. Besides that, M3 BitLocker Loader for Mac can also encrypt external drive so that it is protected by BitLocker.
Read BitLocker drive on your Mac
Enter the password to unlock BitLocker drive on your Mac and then transfer files from the BitLocker drive to your Mac computer.
Once the files leave from the BitLocker drive, they won't be protected by BitLocker any more.
Write to BitLocker drive on your Mac
Enter the password to unlock BitLocker drive on your Mac and then write to this drive. For example, modify, edit, delete files, add new files, rename.
BitLocker will automatically encrypt these files to prevent the unauthorized access once they are written to this BitLocker drive.
Mount BitLocker drive on your Mac
Enter the password, mount BitLocker drive in read-write or read-only mode. After mounting it, you can operate this mounted BitLocker drive in Finder like a Mac computer's native drive.
BitLocker encrypt an external drive on Mac
BitLocker drive encryption can be used to encrypt an external drive with FAT32, NTFS, exFAT file system on Mac OS X 10.11 and later version. Refer to tutorial: How to encrypt USB flash drive with BitLocker on Mac?
1. A healthy BitLocker drive is required. If BitLocker drive has been corrupted, try M3 Data Recovery to recover data from corrupted BitLocker drive.
2. Have the correct password or 48-digit recovery key. It will be used to unlock the BitLocker drive on your Mac computer. If the password and recovery key are unknown or lost, M3 BitLocker Loader for Mac won't break into your BitLocker drive. Refer to How to unlock the BitLocker drive without password and recovery key.
3. The file system of an external drive must be NTFS, FAT32 or FAT32. If the file system is other type, please format it to NTFS, FAT32 or exFAT before using M3 BitLocker Loader for Mac.
Step 1: Free download, install and launch M3 BitLocker Loader for Mac on your Mac.
Step 2: Connect a BitLocker drive to your Mac.
If you are using macOS Catalina or later version, open System Preferences > Security & Privacy > Privacy > Full Disk Access > Allow M3 BitLocker Loader.
Step 3: After inserting BitLocker drive, click "Ignore" button when seeing"The disk you inserted was not readable by this computer" message.
Step 4: Click BitLocker drive in M3 BitLocker Loader for Mac.
Step 5: Enter the password (or recovery key) to unlock this BitLocker drive.
If you lost the password and recovery key, M3 BitLocker Loader for Mac won't break into your BitLocker drive. Refer to how to unlock a BitLocker drive without password and recovery key?
Step 6: Click "Unlock" button to mount BitLocker drive in read-write mode on your Mac.
After mounting this BitLocker drive, you can operate this mounted BitLocker drive in Finder like a Mac's native drive. For example, read, write, edit, delete, modify, rename.
Step 7: After completing read and write operations, click "Lock" button in the program to lock your BitLocker drive.
Step 8: In main interface, click "Eject" button to safely eject BitLocker drive from you Mac computer. Don't unplug it.
Step 1: Free download, install and launch M3 BitLocker Loader for Mac on your Mac computer.
BitLocker drive encryption function requires Mac OS X 10.11 and later version.
Step 2: Connect an external drive to your Mac computer.
External drive can be USB drive, flash drive, SD card, thumb drive, pen drive, USB stick, external hard drive. The file system of external drive must be NTFS, FAT32 or exFAT file system.
Step 3: Click Encrypt button in toolbar of M3 BitLocker Loader for Mac.
Step 4: Click Encrypt button located at the right side of the specific external drive.
Step 5: Enter the password. It will be used to encrypt external drive and then unlock BitLocker drive later.
Step 6: Save the recovery key. It will be used to unlock the BitLocker drive if you forget the password in future.
Step 7: Complete BitLocker drive encryption on the external drive.
From MIT KB
As a BitLocker To Go for Mac utility, M3 BitLocker Loader for Mac is recommended by IS &T staff members in Knowledge Base of Massachusetts Institute of Technology. Learn more >>
M3 BitLocker Loader is software that lets you use BitLocker-encrypted drives on systems that don't otherwise support BitLocker. Learn more >>
M3 Mac BitLocker Loader is a tool that can be used on the Mac to treat (primarily) Windows systems that have been encrypted with BitLocker are only intended to be decrypted and viewed on Windows systems but M3 Mac BitLocker Loader's purpose is to let you view the file system of these computers and access it without encryption getting in the way. You can also copy files to the encrypted drive and it'll still be encrypted when you're done! Learn more >>
Supported storage devices
External hard drive, USB drive, flash drive, SD card, CF card, memory card, memory stick, USB stick, etc.
Supported OS: macOS Big Sur, Catalina, Mojave, High Sierra, Sierra and Mac OS X El Capitan, Yosemite, Mavericks, Mountain Lion.
Supported file systems: NTFS, FAT32, exFAT
The length of BitLocker drive password: Up to 48-digit. If it is long password, please use the recovery key to unlock the drive.
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