@tami15, Welcome to HP Support Community!
For OS X 10.9 and newer, download HP Easy Start, and then use the software application to uninstall your HP software.
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Go to 123.hp.com/setup, and then click Download.
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After the software downloads, open HP Easy Start.
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Click File, and then select Uninstall HP Software... from the menu.
Figure : Select Uninstall HP Software...

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Read any warnings that display, and then click Continue.
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When prompted, type your administrator user name and password.
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HP Uninstaller removes all HP printer software previously installed.
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If you are reinstalling the HP printer software, click Set Up New Device, and then follow the instructions to install the printer with HP EasyStart.
Now, try printing and scanning.
Hope this helps! Keep me posted.
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TEJ1602
I am an HP Employee