Should I turn on Filevault Disk Encryption?

When It Makes Sense

• Good fit: You use a Mac laptop for business or store sensitive client data, and you need protection if the device is lost or stolen.
• Good fit: You work in a regulated environment (e.g., healthcare, finance) that requires encryption at rest to meet compliance standards.

When You Should Avoid It

• Warning sign: Your workflow depends on third‑party tools (certain backup or disk‑cloning utilities) that are known to be incompatible with FileVault, and you cannot verify they will function correctly on an encrypted volume.
• Warning sign: You have an older Mac with limited CPU resources and need maximum performance for intensive tasks, and you are unwilling to accept even a modest performance impact.

Pros and Cons

Pros

• Protects data on a lost, stolen, or discarded Mac by encrypting the entire startup disk, making the information unreadable without credentials.
• Helps meet many industry‑standard security frameworks that mandate encryption at rest, reducing organizational liability.

Cons

• The initial encryption process can take several hours and may temporarily slow the system while it runs in the background.
• If you forget your password and lose the recovery key, the encrypted data becomes unrecoverable, potentially causing data loss.

Decision Checklist

• Do you regularly handle personally identifiable information, financial records, or proprietary data on this Mac?
• Are you prepared to securely store the FileVault recovery key outside the encrypted device?
• Can you confirm that essential software (e.g., backup, virtualization) works correctly with a FileVault‑encrypted system?

Alternatives to Consider

If full‑disk encryption feels excessive, you can encrypt specific files or folders using encrypted disk images, rely on cloud storage services that provide encryption at rest, or use third‑party per‑file encryption tools. These options reduce overhead but may not meet strict compliance requirements.

Final Recommendation

For most users who store sensitive information or must comply with data‑protection policies, enabling FileVault is a prudent step that adds a strong layer of defense against physical loss. Ensure you back up the recovery key in a safe location and verify compatibility with critical software before turning it on. If performance or software compatibility is a concern, explore targeted encryption methods instead. For high‑stakes environments, consult your organization’s security officer or an IT professional.