HP Designjet printers - Updating HP Software to Support OS X 10.7 Lion

2. Click the Apple menu ( ), and then click System Preferences. The
System Preferences window opens.
3. Click Print & Scan. The Print & Scan window opens
4. Click Add Printer, and then click the name of your HP product.
5. The HP product name displays at the bottom of the pane and in the Print
Using box. A 'The selected printer software is available from
Apple. Click Add to download and add this printer' message should
display.
6. Click Add to start the download and setup, and to automatically create the HP
printer queue.
+ Will my printer support Mac OS X 10.7?
If your product supported OS X 10.6 Snow Leopard, it should continue to support OS
X 10.7 Lion. Click this link,
HP Products with Print Drivers Included in Mac OS X 10.6
Snow Leopard for a list of HP products that support Lion.