Full Disk Access and why you shouldn’t be afraid of It

When macOS 10.14 Mojave was released, Apple named it the “most secure macOS up to date.” macOS Mojave update introduced unprecedented restrictions on third-party apps that operated on Macs. These restrictions made it impossible for apps to easily access your content, calendar, contacts, camera, and microphone. With global data leakages happening daily, no wonder that in 2018 Apple placed a kind of “an Iron Curtain” that sealed up your most important data, namely, Full Disk Access permission.

What is Full Disk Access in macOS Mojave?

Full Disk Access feature is much like a security check at an airport. When you grant “Full Disk Access” to an app, it is added to the whitelist of applications that are now marked as safe to work with your data. At the same time, all other applications will be greeted with “You Shall Not Pass.” The protected areas that require Full Disk Access permission are your Mail, Messages, Safari, Home, Time Machine.

According to Apple: “So if your app attempts to access any data that is part of one of the protected categories, the system will automatically terminate it.” And by “terminate,” Apple really means a forced crash.

What does Full Disk Access mean to you?

On the release day, users reported several app crashes and complained that using some apps got troublesome cause they haven't been yet optimized for 10.14. macOS Mojave has been out for a long time, so app developers have already prepared their apps to meet this OS version's requirements. 

But, if you're going to upgrade to Mojave, you might expect that many apps will start bombarding you with prompts to grant them the so-desirable "Full Disk Access." Should you grant such access? We'll try to answer that further below.

When should you grant Full disk Access for an application?

First, if an app comes from a credible developer and you want it to do its job properly. Obviously, a daily scheduler or some other app from the “Productivity” category would absolutely need access to your Calendar in order to simply function. On the other hand, if some Chess application asks to access your Mail, you should be concerned about its real intentions.

Mojave Permission Camera

Normally, credible apps would politely explain why they want to access your disk and specify their activity limits. For example, like disk cleaners or disk backup software, apps from the utility category are designed to analyze your disk contents to do their job properly, so giving them “Full Disk Access” makes sense. But even if you don’t, these apps will still retain much of their functionality, though be limited in certain actions. To sum it up, providing “Full Disk Access” is perfectly normal if you follow these 2 main conditions:

  1. An app comes from a trusted source.
  2. The explanation for the FDA is reasonable.

If you doubt the app’s declared intentions, you can contact the app developers — usually, their response will be quick and to the point.

How to give Full Disk Access?

Full Disk Access is administered via System Preferences > Security & Privacy. Starting from macOS 10.14 Mojave, it contains a special Full Disk Access section that looks like a folder. Easily enough, you can drag & drop your apps onto a pane right from the Applications folder. But before that, you should “unlock” this dialogue window.

How to see Full Disk Access Utility

How to see Full Disk Access utility:

  1. Click on Apple icon > System Preferences...
  2. Go to Security & Privacy
  3. Click on a Privacy Tab
  4. Click the Full Disk Access section in the sidebar.

Now click the “lock” icon and enter your system password to unlock the panel settings. Well done! Now you can drag & drop apps directly from your Applications, so they have Full Disk Access. You can also do it in bulk by adding many apps at once. Alternatively, you might click the “+” sign to add apps one by one.

Note: For more security of your accounts, you can click “Advanced…” in the same window and tick the checkbox that reads “Require an administrative password…”. This will prevent other users of your Mac from accessing the most important system parts and thus minimize the potential damage from such actions.

What are Full Permissions, and how to give them?

How is Full Disk Access different from standard permissions requests on macOS? Permissions are granted for individual actions, like accessing your Photos, whereas Full Disk Access gives unrestricted rights to do multiple operations on your Mac. System permissions come in 3 types.

Permissions MacBook

Permission-protected areas are contacts, microphone, webcam, Mail, remote desktop control, and calendars. Whenever an app wants to have access to your a, b, c... it will initiate a standard dialogue box (you’ve seen it million times) where you can click either “Ok” or “Don’t Allow.” In the second case, an app will crash if it attempts to access the restricted areas on your Mac. Once again, you should be ready for a flood of permission prompts when you upgrade to macOS 10.14 Mojave.

The new reality is that permissions are no longer a mere formality when dealing with apps on your computer. You should rather view permissions as a tool, which means you can grant and revoke permissions when necessary. For example, if an app is bothering you with notifications, you can easily take away its privileges in System Preferences/Privacy/. Starting from macOS Mojave, this particular panel will become an often-visited place on your Mac.

Broken permissions?

The problem comes when some user permissions get lost or broken. One morning you may find that you no longer can open a file or access a certain folder on your Mac. Luckily, there is an easy way to fix it.

You Don't Have Permission Mac Problem

I usually fix disk permissions with a tool called CleanMyMac X, which has a pretty strong reputation within the Mac community.

To fix broken disk permissions:

  1. Download CleanMyMac from the developer’s site (free download)
  2. Click the Maintenance tab
  3. Check Repair Disk Permissions
Check Repair Disk Permissions

If you perform the rest of the maintenance tasks from the described section, you may even see your Mac running faster and smoother.

Privacy Permissions not working on Mojave (Camera and Mic)

An often reported issue on macOS Mojave is camera and microphone permissions not working properly.  While Apple’s own apps handle camera and mic perfectly well, many third-party apps (like Skype) end up becoming totally unusable due to missing permissions or “Full Disk Access denied.” In such cases, a dialogue box that requests permission is never displayed, for whatever reason. And if a program hasn’t requested permission — you guessed right — there is no way to make it work. What can you do?

  1. Reinstall the app in question
  2. Add the app to the Full Disk Access folder (see above)
  3. If nothing else helps, you may want to downgrade to macOS High Sierra

macOS Mojave privacy changes (and challenges)

Apple’s decision to harden security requirements on macOS Mojave was a long-expected move. During the first days of the macOS Mojave release, the users faced a swarm of software conflicts linked with macOS permissions. Some have reported their audio apps crashing while attempting to enable microphone access. Still, the stronger grip on security will be beneficial for all of us in the long run.

To save yourself from the misfortune of constantly crashing software, it is recommended that you update all your apps to the latest available versions. The good news, it no longer means hours of googling. You can use the tool I described above, CleanMyMac X, which has a quick built-in Updater module.

  1. Run CleanMyMac X (Download a free version here)
  2. Click Updater
  3. Mark apps you want to update
Mark apps you want to update

This will reduce the chances of your apps crashing on macOS Mojave.

Under today’s security standards, users must explicitly authorize any app i.e., “an opt-in” logic will become prevalent. Previously, malicious programs could simulate the supposed consent using the so-called synthetic clicks — a term from a hacker universe. Such practice becomes more difficult, but it doesn’t mean “data leaks” will disappear anytime soon.

The described pre-authorization logic is nothing new for iOS users and has gradually become an industry standard. But who would complain about having stronger security on their Mac? Eventually, we’ll get there, even if it means making a few redundant clicks every day.

Laptop with CleanMyMac
CleanMyMac X

Your Mac. As good as new.