How To Get Permissions For Usb Mac Os

HDDs, SSDs or Flash drives connected to a Mac can have their ownership relaxed when the drive is intended to be removed and shared with others. Here’s how and why to change the setting. First, note that the ownership of all files and folders is restricted on the boot volume, which is owned by root. Can you download fl studio producer edition for mac free download. If you’d like to verify this, you use do the following: • Open the terminal app • enter: cd /Volumes • enter: ls -la In my case, the internal boot drive, Altair, is owned by root. That’s necessary to enforce UNIX protocols for access and permissions by multiple users.

Terminal results for /Volumes If you’d like to share an external drive with others, however, this UNIX protocol can get in the way when the drive is mounted on another Mac. The solution is to set a flag to ignore ownership concepts (but not permissions) on the drive. That flag is found in the Get Info (CMD-I) box for the drive at the very bottom. (Note you may have to authenticate with an admin password if the padlock has this setting locked.) Bottom Part of Get Info box for a drive In fact, when you check this box, special UNIX flags are set such that whoever mounts the drive sees himself/herself as the owner. It’s pretty neat.

A 16 GB USB flash drive is large enough to install both a complete copy of the Mac OS and some of your favorite applications or recovery utilities, making it a budget-friendly emergency device that can boot your Mac and possibly repair or recover its data and get it running again.

Note, however, the originally set permissions for that owner remain intact. So if the (floating) owner has only read-only permission for a file, that will remain in force for anyone who mounts the drive.

Of course, as owner (and possibly admin user) those permissions can be altered. If the drive is the boot drive or a Time Machine drive, you won’t have the option to set this flag. If the flag is not set, the drive will show up in the terminal as owned by root. If you set the flag, it will show up in the terminal as owned by you. (See the first screen shot above.) Note that if you’ve installed a backup version of Mac OS X on a drive and expect to boot from it, DO NOT SET THE FLAG. In summary, if you have an external drive you expect to share with others or move from Mac to Mac, it’s helpful to set the “Ignore ownership on this volume” flag to make copying files to and from the drive seamless.

Bootable drives should never have the flag set.

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We have our work drive (let's call it Drive2014) and we have our archive drive (Drive2013). Every file on Drive2013 is read-only and must remain that way. When I drag a file from Drive2013 to Drive2014, I need the file to inherit the permissions from it's new home on Drive2014. I tried but this is only applicable after the file has been copied. Someone mentioned that what I want to do is feasible through Apple's Server Admin Tools.

I'm running the latest version of OS X Mavericks Server all up to date. What you need to use is ACLs (instead of POSIX) permissions. Luckily, you don't need Mac OS server to use ACLs. They are available right from the Terminal of any recent Mac OS X version. From Terminal, you will simply use the 'chmod' command to apply ACLs to your Drive2014. The ACL command you will use should include ',file_inherit,directory_inherit,'. Full details of the 'chmod' command are available here: And, the perfect solution to your question (with command examples) has already been answered well here: Make sure to read that post to the end as they have made a few corrections along the way.