Sync Checker for Mac is a file synchronization diagnostic tool for Mac. It can check whether two folders or disks are completely synchronized, that is, whether they have exactly the same content. After performing a synchronization check, Sync Checker will confirm that all files are the same, or it will display all detected mismatches. You can browse different items to accurately analyze where the mismatch occurred, and whether the difference is critical or negligible.

Official introduction

Sync Checker Mac can check whether two folders or disks are completely synchronized, that is, whether they have exactly the same content. In other cases, it may be interesting to find the differences between the file sets. For example, you may want to know which files have changed on your computer, and compare a Time Machine backup from last Friday with a backup from last Tuesday.
After performing the sync check, the sync checker will confirm that all files are the same, or it will display all detected mismatches. You can browse different items, accurately analyze where the mismatch occurred, and whether the difference is serious or negligible. Filtering tools can help you browse through a large number of unmatched objects. You can also create a text report of the results that can be printed or exported. Advanced users can create ignore lists to exclude specific files from synchronization checks, or use archive file scanning to perform offline checks.

New features

New features have been added to create and edit ignore lists that can be used to exclude file system objects from synchronization checks. The ignore list can be defined based on the relative path of the folder or the name of the file system object.
Added several built-in ignore lists to exclude .DS_Store files, or to exclude macOS standard working files.
Added new features to create offline scans. These scans retain a snapshot of the metadata of the folder hierarchy and can be used as an archive data source for synchronization checks. Offline scanning can compare folders with previously saved states to track change history. You can also use them to compare the folders of two computers that are not connected to each other.
The maximum number of mismatches that can be handled has been increased to 100,000.
Added a new internal diagnosis function.
The application can now detect when it runs from its distribution disk, but it has not yet been copied to the computer. Support optional self-copy operation.
The application already provides powerful features for certain “cleanup programs” that may damage the installation of privileged security components.

Features introduction< /h1>

1. Check whether the two sets of files are “synchronized”, contain the same objects and have the same attributes.
2. Compare any two file sets that macOS can access through two folders.
3. When providing the password of the system administrator, the check can also include the entire system disk with other user files.
4. The content comparison can be executed byte by byte, or it can be executed using intelligent acceleration technology.
5. There is no limit to the number of files that can be checked. The maximum number of mismatches that can be evaluated is 100,000.
6. As an alternative to precise checking, you can run a quick test to determine which files are missing in the two folders that should match. 7. Scans of the folder hierarchy can be archived to perform offline checks. Such a snapshot can be used as a virtual data source for comparison. This powerful method can be used to compare collections of files at different points in time, or to compare files with data from another Mac without a direct connection.
8. You can choose to ignore certain file aspects, such as file system level compression, the time of the last state change, POSIX permissions, access control lists and Time Machine attributes.
9. File system objects can be excluded from the synchronization check by using the ignore list. The ignore list can be customized freely, blocking objects by name or relative folder path.
10. The predefined ignore list already built into the sync checker allows you to simplify typical comparison tasks in practice.
11. Use a powerful object browser with filtering tools to view unmatched file system objects.
12. Check all file attributes, Unix flags, permission settings and the detected differences in extended attributes.
13. Create text reports of mismatch analysis, which can be printed or exported as RTF text processing files.
14. Save the results to a file and evaluate them offline later, even on another computer.

Update log< /h1>

Sync Checker for Mac (File Synchronization Diagnostic Tool) v3.3 Special Edition adds a new feature to ignore time deviations of less than 1 second (if needed) when comparing the properties of file system objects. This is necessary to obtain meaningful results when checking data between file systems that store time specifications with different precisions. A new function has been added to display the time specifications of file system objects in millisecond resolution when necessary. This feature is available in MacOS 10.13 High Sierra or later. The function of ignoring time machine attributes during synchronization checks has been extended to also consider the access control list permissions used by the time machine. When using time machine files, it is no longer necessary to disable all ACL checks. The list of extended attributes to be ignored during inspections related to Time Machine has been updated for the latest MacOS version.