On January 20th, 2016, Google pushed out the Google Chrome v48 update and this new update prevents MySpeed from working with Chrome on Mac El Capitan OS X 10.11 and later.

This issue only applies to systems running OS X 10.12 Sierra and 10.11 El Capitan. On earlier versions of the Mac OS (10.10 Yosemite, 10.9 Mavericks, etc). Google Chrome will continue work with MySpeed as before.

Starting with v48 and later, Google Chrome is now ‘opting-in’ to Apple’s new System Integrity Protection on OS X 10.11 and later, much like Safari does. OS X 10.11 and later prevents MySpeed from being able to interact with any application that is under the control of System Integrity Protection. There is nothing we can do about these changes from Apple and Google. Additionally, our discussions with the Google Chrome team did not yield any compromises.

You do have several options however:

1. You can use MySpeed with the Firefox and Opera browsers.
2. We are working on an update and soon MySpeed will also support other browsers on OS X including Citrio and SRWare Iron. 
3. While not recommended, you can disable, or partially disable System Integrity Protection. Please see the information below on how to go about that.

We will continue to work to provide options to ensure MySpeed works on your Mac as much as we are able and thanks for your continued support.

Disable System Integrity Protection

The supported way to disable System Integrity Protection in those cases where it's truly necessary is to boot into the Recovery partition and use csrutil tool.   See the "Disable System Integrity Protection" page on our site for full details.

Applies to: MySpeed for Mac Version Version 6+

Operating System: OS X 10.11+

Browser: Chrome v48+