El Capitan and Microsoft Mouse (IntelliPoint) Not Working

Not working here.  Disabled SIP and no luck.  Made a script as mentioned by someone and has it launch as an agent and daemon and no luck.  With it running under daemon I couldn't click around, unplugged it and plugged back in and same thing.  If I go into the MS PreferencePane then it works.  Exit out and stop working.  Ugg.....my favorite mouse for years!  Even have a backup incase it fails!....lol

Ok got it working here.....I was being stupid and setting the left mouse button and right mouse button as forward and backwards.  DUH!

Here is what I did:

1. SIP is still enabled and mouse seems to be fine here so far.  Did disable it and re-enabled while testing. 
2. Below where you see "yourusername" change it to the name of your Home Directory under /Users.
3. You can name DBMicrosoftMouseHelper.sh anything you want, just make sure you point the Daemon to the correct file below.
4. Same for com.ptc.DBMicrosoftMouseHelper.plist, it can be named com.whatever.plist.

First Created Script as mentioned before:

1. cd /Users/yourusername/Documents
2. touch DBMicrosoftMouseHelper.sh    (doesn't matter what you name it just keep it the same below)
3. Added following contents to file using: pico DBMicrosoftMouseHelper.sh 

#!/bin/bash

Below should be on one line

nohup /Library/PreferencePanes/Microsoft\ Mouse.prefPane/Contents/Resources/MicrosoftMouseHelper.app/Contents/MacOS/MicrosoftHelper

exit

3. Set Permissions on file:

    chmod 755 /Users/yourusername/Documents/DBMicrosoftMouseHelper.sh

Second Created a LaunchDaemon as /Library/LaunchDaemons/com.ptc.DBMicrosoftMouseHelper.plist:

1. cd /Library/LaunchDaemons/
2. touch com.ptc.DBMicrosoftMouseHelper.plist
3. Set the correct permissions on the file:

     chown root:wheel /Library/LaunchDaemons/com.ptc.DBMicrosoftMouseHelper.plist

     chmod 644 /Library/LaunchDaemons/com.ptc.DBMicrosoftMouseHelper.plist

4. Add contents to file using pico com.ptc.DBMicrosoftMouseHelper.plist

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">

<plist version="1.0">

<dict>

 <key>Label</key>

 <string>com.ptc.DBMicrosoftMouseHelper</string>

 <key>ProgramArguments</key>

 <array>

 <string>/Users/yourusername/Documents/DBMicrosoftMouseHelper.sh</string>

 </array>

 <key>RunAtLoad</key>

 <true/>

 <key>KeepAlive</key>

 <true/>

 <key>Disabled</key>

 <false/>

</dict>

</plist>

5. Enable daemon with:

    launchctl load com.ptc.DBMicrosoftMouseHelper.plist

6. Reboot for the heck of it and it should work.  In the MS PrefPane I hit the Defaults button at the bottom and setup all my buttons again, but I don't think you have to do that.  I was just being stupid with what I did setting the wrong buttons.

So I just removed the /Library/LaunchDaemons/com.ptc....   file and the mouse is still working after reboot.  Did everyone just try reinstalling the drivers from MS?  

https://www.microsoft.com/hardware/en-us/d/intellimouse-optical

I did and had issues still.  I did go in at one point into the Microsoft PrefPane and defaulted the buttons and set them up again. But not sure at what point I messed up the buttons setting the left and right as the back and forward buttons.

I just tried this, typed exactly what you had very carefully and got a whole lot of scary error text in the Terminal window I didn't know how to fix.

I'm now trying to re-install El Capitan and still have no idea how I'm going to be able to work at my client's studio without a functioning 3D mouse tomorrow.

I never anticipated this much trouble with such a simple thing!

Old Intellimouse has always been rock solid!

Drivers seem to have gone from that page.