Starting with 6.11.0-rc5 we have added some features to help us figure out the proper mix of SMB settings which will achieve the best performance/functionality with MacOS.  This mainly involves tuning the so-called "fruit" SMB parameters.  Please refer to the Samba "vfs_fruit" doc: https://www.samba.org/samba/docs/current/man-html/vfs_fruit.8.html   First you will notice there are Global options and Per-Share options.  The global options are set in /etc/samba/smb.conf file on your