Common way to downgrade your Mac from 卡塔利娜莫 Hawei including the use of Time Machine backup, and use a USB drive, the version of the Mojave Desert of a bootable MacOS. Unfortunately, in this process, all files on the device have been completely removed. How, without the backup of the Mac OS Catalina revert back to Mojave restore data?
The macOS from 10.15 to downgrade to an older version if missing some important documents in this process, use Tenorshare UltData-Mac immediately restore them.
UltData is a professional data recovery program on your Mac. This program has excellent data recovery, and recovery process simple;
Step 1. Download and install UltData on a Mac, then start it. Select the location of the files have been deleted on your hard drive, and then click "Scan."
Step 2 UltData will start scanning the hard drive deleted files. Shortly after, the scan results will be generated and displayed on the screen.
The results are listed in step 3 many files. Select the desired file, then click "restore" to restore immediately.
Be sure to restore files to a different partition. If you restore them to the same partition, the file will be overwritten and permanently lost.