December 17th, 2021 - 6.3 MB - Universal 32/64 bit - macOS 10.13+ with both Apple Silicon and Intel processors.
Successfully tested on macOS Catalina, Big Sur and Monterey.
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What's new
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• FoldersSynchronizer is now a Universal macOS app running on both Apple Silicon and Intel processors.
• The Scheduling Timer window now lists the timers with the 24 hours notation.
• Other minor fixes and improvement.

Features
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•FoldersSynchronizer is a nifty and popular shareware utility for macOS to Synchronize and Backup files, folders, disks and boot disks.
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•FS can backup the whole macOS boot disk and make it bootable.
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•FS can auto-mount local and remote volumes.
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•FS can exactly sync/backup the files/folders deleted or renamed (Exact Sync and Exact Backup features).
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•FS can create, save and open "Sessions Files".
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•FS allows creating, renaming, duplicating, deleting, editing of several Sessions in a single file.
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•FS can assign to each session several options, as: Settings, Timers, Multiple Folders, Filters, Exclude, Conflicts, Auto-mount, AppleScript.
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•FS can execute in a single task, one or all the Sessions defined in a file.
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•FS can execute one or all the Sessions simultaneously at the time you specify in the timer list.
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•FS can show the Timer Scheduling list.
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•FS can execute "Multiple" synchronizations/backup (up to 32 pairs of folders or disks) specified by a single Session.
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•FS can "Filter" the documents to copy by FileName, Type, Creator, Creation Date, Modification Date, File Size, Owner, Group and Kind (File or Folder).
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•FS can "Exclude", from the sync or backup, the folders and files (with absolute path) you specify in the Excluding item list.
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•FS can check and behave as you specify whether a "Conflict" occurs before replacing or deleting a recently updated file.
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•FS can check whether both the files have been modified after the last Sync/Backup.
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•FS can check, during a backup, whether the destination file has a most recent modification date.
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•FS can run an user's AppleScript before and after executing each session (sync or backup).
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•FS can copy invisible Files and Folders.
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•FS can include/unlock the locked files, so it can delete/replace also the locked files, if necessary.
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•FS can resolve Aliases and SYM links.
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•FS can skip the empty folders.
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•FS can copy the new files only and skip the most recently updated files.
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•FS can stop or skip or ask for further instruction, if an error or a conflict occurs.
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•FS can show the "Items to be copied" Preview List. Here, again, the user can exclude some items from the copy (skip).
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•FS can save/display short or detailed Log Files (always or only if an error occurred).
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•FS can send the Log Text via Email to a custom email address (always or only if an error occurred).
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•FS can work with root privileges, even if the user is not the root (if requested by the user, FS asks for the root's password at any launch).
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•FS can use a "modification date delta seconds" value when calculating the most recent file.
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•FS works properly on Unicode Strings, Long file names, Unix permissions, ACL and Extended attributes, Multiple forks, Forks > 2GBytes, SYM links and GMT Date/Time.
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•FS allows drag and drop of source and destination folders/files/disks and aliases.
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•FS can automatically check for updates.
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•FS can work in background (multithreading).
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•FS registered copies have no limits regarding the amount of files and folders or the total byte size.
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•FS has been successfully tested on OS X from 10.9 to 10.11 El Capitan. Look at the previous versions for previous OS, for Intel and PPC machines.

Technical Notes