Part 1. Overview of Deleted Files Recovery on Mac
Though deleting files on Mac is the common phenomenon to be heard frequently, it still differs quite according to further explanations. There are four main causes leading to deletion on MacBook mistakenly, which are failure, intentional action, unintentional action and disaster. You can read following descriptions of deleted files recovery on Mac.

The first "Failure" means all kinds of operation failures, including hardware failures, power failures, system crash, software corruption, data corruption and other similar causes.

And "Intentional Action" represents intentional deletion of files and partitions, or the hard drive formatting on Mac.

The "Unintentional Action" indicates you just delete the wrong files on Mac. Or the computer viruses attack, system hacking and other unexpected situations.

As for "Disaster" factor, it seldom occurs in people's daily life, like thunderstorms, floods, tomado, fire, etc. But once it happens, you may lose more than pure OS X data.

Part 2. How to Recover Deleted Files on Mac
You are suggested to backup MacBook Pro/Air to iCloud. But it will not be the disaster as long as you have a great data recovery. Get the good data recovery software on Mac is your top choice, to recover deleted files on Mac safely. And Disk Drill should be one of the most popular Mac data recovery software, which can recover wide selections of data on Mac OS X/11, such as critical business documents, music, photos, videos and other additional file types.

Section 1: Main Features of Disk Drill about Recovering Deleted Files on MacBook
You can recover deleted files from Mac OS X/11 easily even though the whole partitions went missing. And there is no requirements towards users, just prepare one USB cable, and then you are able to use the Mac data recovery app without expert skills needed.

Recover any file or folder more than 200 file types with several data recovery methods.
Support deleted files recovery on Mac internal storage or external storage, other major digital devices and even formatted drives are recoverable.
Section 2: How to Recover Deleted Data from Mac Hard Drive
Step 1. Launch Disk Drill

Download Disk Drill free version online, and you can upgrade it into the Pro version later. The latest Disk Drill requires Mac OS X 10.8.5 or later. For software installation on Mac, you need to drag the deleted files recovery software into "Application" folder, and then launch Disk Drill.

download disk drill
Step 2. Verify your disk condition

If your computer got heavy physical damages, then it is useless to recover deleted files from Mac with Disk Drill. Or you can use the free provided tools to detect the condition of your MacBook computer, and create a byte-to-byte disk image in DMG/ISO format.

verify disk condition on mac
Step 3. Recover deleted files from hard drive of Mac computer

If you wanna recover deleted files from Mac external hard drive, use USB cable to connect. Choose the name of the hard drive to recover with individual partitions. Or you can undelete files in Mac OS X/11 with more selectable choices. Moreover, the "Create boot drive" wizard can help you get recovered files of Mac USB drives as well. Choose the disk from the selectable list, and then start scanning on Mac. You can decide to deep scan, quick scan and other customizable scan methods from the provided list. Wait for 1 minute, and then you can recover deleted files from MacBook successfully.

recover deleted files from mac hard drive
Section 3: How to Recover Deleted Partition on Mac OS X
Step 1. Connect to the external drive to recover deleted files

Download Disk Drill and drag it into the "Applications" folder to launch. Whether you need to recover deleted data from internal hard drive or external drive, your recovered data still need to be saved into the external drive. Therefore, connect external drive to Mac. Select the disk to recover the disappearing partition from. Hit "Recover" button besides the main disk name.

connect external drive to computer
Step 2. Recover deleted partition on MacBook

Scan the whole disk for a while, and then Disk Drill will display scanned files in the resulting list.

If you have data files on SD card, just connect your SD card to this computer with reader, and start to get SD card recovery on Mac by following the steps below.

Hit the "eye" icon besides to check detail information. Choose before deleted files and set the destination folder. What's more, click "Recover" button to recover deleted partition on Mac selectively.

recover deleted partition on macbook
Part 3.Bonus tips – Recover deleted files on Windows
In this part, Windows users will get the bonus tip, how to recover deleted files on Windows computer. Apeaksoft Data Recovery https://www.apeaksoft.com/data-recovery/ is the helper that is indispensable.

I would recommend using it's a wonderful data recovery application made by that helped me a lot to retrieve my data after formatting a hard disk. It should be able to handle both rapid and common file types, methods to recover deleted photos on a mac as well as restore the files to their original condition, allowing you to back them up wherever you choose. I recommend that you give it a go.