If you cannot create the byte-level backup, scan the affected Mac using Disk Drill from the host computer.Use Disk Drill to create a byte-level backup of the SSD drive to be used to recover its data.Restart the affected Mac in Target Disk Mode and connect it to the host computer.Use another Mac to download and install Disk Drill.

Turn off the Mac as soon as you realize you have lost some data.If TRIM is enabled on your MacBook Air, MacBook Pro or iMac, recovery is not possible without a backup of your data.

Here is the procedure to use to recover deleted data from an SSD drive that has TRIM disabled. Solid-state drives (SSDs) provide higher access speeds and are using in many newer Apple Macintosh computers. This will ensure the final failure will not occur while Deep Scanning, more data stays safe and potentially recoverable. Once the backup disk image is created, you may start your hard drive recovery from the image instead of the real hardware. Yes, you get it right, the sectors where your lost data can still reside. The unique aspect of the byte-to-byte backups is the fact they actually store the contents of data sectors that were marked as empty, not occupied by data. Just proceed with 'Backup / Backup into DMG-image'. However, before that happens, if you suspect an improper disk behavior, ticking sounds, slow read/write operations, we recommend using Disk Drill's supplemental free tool that helps anyone create a byte-to-byte disk image in a DMG (or ISO) format. If the target disk got bad sectors, or electronic controller fails in some operations, it's not much that can be done by Disk Drill with data stored in affected disk areas. As mentioned before, physical damage to your storage device is no help with software-based data recovery.

Mac disk utility check for bad sectors