Starting with macOS 10.11 (El Capitan) Apple has introduced System Integrity Protection (SIP). This prevents M4V Converter Plus to run.
If you are the macOS 10.11 users with iTunes 12.6 or later, you need to do some settings to make the software work.
This article describes how to configure your machine by partially disabling the new setting, so that you can run the M4V Converter.
There are 2 ways to make your software work successfully.
Before you do this, it is important to get informed about what System Integrity Protection is, and what it means to turn it off. Technical details are well covered in the El Capitan review on Ars Technica. Apple also provide some information here.
Anyway, if you decide to partially disable SIP, you will be able to install and run it as before. Just to be clear.
Please Note that, your machine may be less secure if you do. It is entirely your decision.
1. You must boot into the Recovery OS. You do this by restarting your machine, and holding "COMMAND + R" until the Apple logo appears.
Then select Terminal from the Utilities menu. It looks like this:
2. In the window that opens, type "csrutil enable --without debug" and press return.
3. This turns off the part of SIP that M4V Converter Plus needs to run, and OS X complains that it is an unsupported configuration.
reboot and press return to restart your machine. After
restart you may install the latest version of M4V Converter Plus.
After adjust the above settings, you will be able to install and run M4V Converter Plus as before.
If you don't want to configure the SIP settings, you could also revert to iTunes 12.5 to make the program work normally under Mac OS 10.11 or macOS Sierra. There are 3 steps:
Want to know more details, please go to "How to Downgrade iTunes 12.6 to 12.5".
Since M4V Converter Plus for Mac V4.3.0 has been released, and users can free download and install it to work with iTunes 12.6. There is no addtional need to disable your SIP or downgrade your iTunes. And then you can use M4V Converter Plus to deal with your movies and TV videos on iTunes 12.6 as you like.
If you have some other problems, please contact our Support Team at firstname.lastname@example.org to get assistance.