Normally, a drive encrypted by Windows BitLocker is not readable by macOS. So, if you need to access a BitLocker-encrypted drive on Mac, you will have to use a third-party utility like iSumsoft BitLocker Reader for Mac. iSumsoft BitLocker Reader for Mac is a utility that helps you unlock BitLocker encrypted drive on macOS. It allows you to use your password or recovery key file to unlock your BitLocker drive on Mac. Once the BitLocker encrypted drive is unlocked, you can open it to read its contents or transfer files between the drive and Mac.

iSumsoft BitLocker Reader for Mac has the features of good compatibility and easy-to-using. It supports external hard drive, USB flash drive, memory card, memory stick, SD card, CF card, and other removable storage devices, and works on all Mac OS platforms including macOS 10.14/10.13/10.12 and Mac OS X 10.11/10.10/10.9/10.8/10.7, etc.

Here are the simple steps you can take to unlock, open and read a BitLocker encrypted drive on macOS.
Step 1: Install and then launch iSumsoft BitLocker Reader for Mac on your Mac computer.
Step 2: Select the BitLocker encrypted drive from the list and then click the Unlock button.
Step 3: Enter your password for the BitLocker disk or import your recovery file to unlock the drive, and then click Mount.
Step 4: Once the BitLocker-encrypted drive is unlocked, you can open the drive to read it or transfer files between it and Mac.
Step 5: After you finish using the BitLocker encrypted drive on your Mac, click Eject to disconnect the drive from the Mac.

In addition, you can use the Attach button to mount disk image file (.dmg) on your Mac, if you need.