1. Mount "HP-Color-LaserJet-CMXXXX-MFP-series_v1.5.0.dmg"
2. Copy "HP CLJ CMXXXX MFP series v1.5.0.mpkg" to your desktop (it is important to copy this package to HDD so you can edit it)
3. Right-click on the copied package and select "Show package content"
4. Navigate to "Contents"
5. Right-click on the "distribution.dist", select "Open with" and open this file with TextEdit or another text editor
6. Find a line of code which looks like this (should be on beginning of the file):
   if(!(system.version.ProductVersion >= '10.5.0')) {
   and delete the exclamation mark "!" so the line should look like this:
   if((system.version.ProductVersion >= '10.5.0')) {
7. Save and close text editor
8. Now you CAN install this package on OS X 10.11 Yosemite - HP Director and HP Scan works like a charm

I followed your instructions, but the distribution file shows as locked and will not let me modify it or unlock it, only duplicate it.  I have administrator permissions but am certainly not a mac expert.  Any advice would be greatly appreciated. I tried to do save over the file and it tells me the distribution file is read only.  As you can tell I am not a mac expert

Hello creativewebz !

I did exactly what you said and it works for HP Color LaserJet CM2320fxi MFP.

Thank you so much !!!!!!!

CM2320fxi