Alternative to Disk Utility mac

Question

So i'm trying to resize a partition on my backup drive without erasing my data (see here).

I have been talking to some of my friends about this since my other question currently has no responses, and one of them recommended I use another program. So therefore i'd like to ask, are there any programs that:

• work on Mac OS X El Capitan
• are free
• I can use as an alternative to Disk Utility (since its not working) to resize the partition on my backup drive.
• I'm ideally looking for one that i can run on just my user without requiring admin permissions to install or run

Answer 1

You could take a look at PartEd Magick:

• Free, gratis & Open Source
• Runs on Intel Based Systems including Intel Macs
• No installation - you boot into the Parted Magic Linux based OS hence you need access to the hardware but not to admin passwords.
• Supports: ext2, ext3, ext4, fat16, fat32, ntfs, reiserfs, btrfs, hfs and hfs+ plus limited support for other file systems.