Driver update for 8600 failed

Question

Using  HP product  CM 750 A  OfficeJet Pro 8600 Plus with  ethernet cable connected to  Mac  21.5", OSX 10.9.5 Maverick. Running HP version 9.4  (447.2), tried to up date to version  12.34 because of two problems: 1. Amost every time I  put the Mac to 'sleep', 10 seconds later the last print job prints.  I don't need extra copies!2. Frequently, after printing one job - e mail, web page, spreadsheet, whatever - and try tp print something else, printer         is frozen.  Dialog box shows the 1st job  and "Connecting to printer" shows. Only cure: re-boot  printer.   So I tried to update printer to v.  12.34    Several times  it hung up at "Utility", finally  completed - I saw "Update              Successful" However, after rebooting Mac, HP still shows  at "About..." the  original "Version  9.4"   What did I do wrong?  How do I get  current version  installed and  WORKING?  And  finally, should I do something to solve problems  #1  & 2  if they persist with new version? Thanks for any help 

Answer 1

, I appreciate you trying my recommendations. I would like you to go ahead and perform a manual uninstall, and remove the driver. Some steps you have done already, but please follow in order: Scrub/ Uninstall
Open the Applications folder > HP or Hewlett Packard folder > HP UninstallerClick continue, click on one of the printers in the list.* Only do this step if you do not have any other HP Printers.  Hold down Control, Option and Command, While holding the three buttons down,
Click uninstall. Manually uninstall potentially remaining files - I apologize in advanced this is not a fun task! I will try to make it easy to follow. Some of the files described in the following steps may not be found, if you can't find one of the files or folders on your computer, don't be alarmed. Move the files and/or folders to the trash, drag and dropMacintosh HD/Applications//Hewlett-Packard folderMacintosh HD/Library/Application Support/ - delete all files and folders regarding HP/Hewlett PackardIn Macintosh HD/Library/Caches - delete all files and folders regarding HP/Hewlett PackardMacintosh HD/Library/Documentation/Help/ - delete all files and folders regarding HP/Hewlett PackardMacintosh HD/Library/Frameworks/HPServicesInterface.frameworkMacintosh HD/Library/Frameworks/HPSmartX.frameworkMacintosh HD/Library/Image Capture/TWAIN Data Sources/HP Scan ProIn Macintosh HD/Library/Image Capture/Scripts - delete all files and folders regarding HP/Hewlett PackardIn Macintosh HD/Library/Preferences - delete all files and folders regarding HP/Hewlett PackardMove Macintosh HD/Library/Preferences/loginwindow.plist to the desktop. NOTE: Not removing the file loginwindow.plist during the manual uninstall could cause the uninstall to be unsuccessful.In Macintosh HD/Library/Printer/hp - delete folderIn Macintosh HD/Library/StartupItems, drag the following folders to the trash, HP IO and HP Trap MonitorIn Macintosh HD/Users/USERNAME (this should have a symbol of a house next to it)/Library/Preferences, drag the following folders to the trash: *Any files beginning with com.apple.print, *Any files beginning with com.hp, *Any files beginning with Hewlett-Packard, *Any files beginning with HP or hpIn MacintoshHD/Users/USERNAME/Library/Printers, drag any All-in-One printers listed here into the trash.Drag the HP icons from the Dock and drop it on an empty space on the desktop. The icon will disappear.Close all open windows.
Restart.
Empty the Trash. Reset Printing SystemClick the Apple icon (   ), and then click System Preferences.In the Hardware section, click Print & Fax/Scan. The Print & Fax/Scan  dialog box opens.Right-click (or  Ctrl  +click) in the left panel, and then click Reset printing system…Click OK to confirm the reset.Type the correct Name and Password.Click OK to reset the printing system. The Print & Fax dialog box shows no printer selectedNote: This will remove all printers in the print and Fax/Scan, any printer removed can be re-added later by clicking the plus (+) symbol. Remove the print driver - If you can not complete a step because the file or folder is missing, do not be alarmed just skip to  the next step. From the computer desktop, double-click the Macintosh HD  icon.Double-click the Library folder.Double-click the Printers folder.Right-click the HP folder, and then select Move to Trash.When prompted, type the Administrator name and Password for the computer, and then click OK. Wait for authentication to complete.Double-click the PPDs  folder.Double-click the Contents  folder.Double-click the Resources  folder.Locate your printer in the printer list, and then right-click on your printer and select Move to Trash.When prompted, type the Administrator name and Password for the computer, and then click OK. Wait for authentication to complete.Click the Trash icon on the taskbar, click the Empty  button, and then click OK to empty the trash. NOTEBy clicking OK, all items in your trash will be permanently deleted from your computer. To delete one item in the trash, click that item to highlight it, and then click OK.On the upper-left corner of the computer desktop, click the Apple menu icon, and then click System Preferences on the drop-down menu.Double-click Print & Scan.In the Printers list, click your HP printer, and then click the Minus button to delete it.Restart the computer Repair Disk PermissionsOn the Dock, click Applications, and then click Utilities.Double-click Disk Utility.Highlight your hard drive/partition on the left (by default this is "Macintosh HD").Click the Repair Disk Permissions button at the bottom of the window.Once the repair is complete, restart the computer.Restart the printer. Now you can download and install the printer software and install it. HP Officejet Pro 8600 series Full Feature Software and Drivers When you add the printer, please ensure you are using the HP driver. Select Add other Printer or Scanner                                                  Select the printer you are adding and next to 'Use' you can the printer driver What are the results?