Sync folder between two macs

xzmac wrote:

How can I keep a folder synchronised between imac and macbook?

Use iCloud to synchronize files across all devices accessing the iCloud account.

Set up iCloud on your Mac - Apple Support

...or put another Mac to target disk mode and use Carbon Copy Cloner to sync the folder (I have used a master folder but I have not tried if this works in both directions, i.e. if it is possible to update either folder and sync that).

not without 3rd party stuff

maybe take a look at

Keyboard Maestro 10.1.1: Work Faster with Macros for macOS

Sync Two Folders | MacRumors Forums

How To Synchronize Two Folders Mac Os X? – LEMP

more

macos keep two dirs in sync - Google-

Use OneDrive, GoogleDrive, DropBox, or similar cloud service.

Or, use a network drive, or use an external usb drive that you switch back and forth between computers.

Has noted, you would need a third-party app to do it as you would like, or you can learn how to rsync in the command line.