If Stellar Data Recovery for Mac software is consuming a lot of time to scan your storage drive, either the drive size is enormous or it has bad sectors. For a large drive size, wait till the scan completes.
In case the storage drive has bad sectors, you should create an image of the drive. Then, scan the image file instead of the original drive to speed up the scan time.
Also, it is not possible to pause the scanning; you can only stop it. Once you stop the scan, you can recover only the data listed in the tree.
Read more: What Are the Minimum System Requirements for Stellar Data Recovery for Mac?
For any further queries on Stellar Data Recovery Professional for Mac software, please contact Stellar Data Recovery Support.