config HFSPLUS_FS tristate "Apple Extended HFS file system support" depends on BLOCK select NLS select NLS_UTF8 help If you say Y here, you will be able to mount extended format Macintosh-formatted hard drive partitions with full read-write access. This file system is often called HFS+ and was introduced with MacOS 8. It includes all Mac specific filesystem data such as data forks and creator codes, but it also has several UNIX style features such as file ownership and permissions. config HFSPLUS_FS_POSIX_ACL bool "HFS+ POSIX Access Control Lists" depends on HFSPLUS_FS select FS_POSIX_ACL help POSIX Access Control Lists (ACLs) support permissions for users and groups beyond the owner/group/world scheme. To learn more about Access Control Lists, visit the POSIX ACLs for Linux website . It needs to understand that POSIX ACLs are treated only under Linux. POSIX ACLs doesn't mean something under Mac OS X. Mac OS X beginning with version 10.4 ("Tiger") support NFSv4 ACLs, which are part of the NFSv4 standard. If you don't know what Access Control Lists are, say N