If you uninstalled Elements 9 but still have the preference files, the serial number is stored in a hidden file.
If you have a legitimate serial number but cannot install it due to system updates, you have two main options:
Option A: Install on an Older Mac If you have an older Mac running macOS Mojave (10.14) or earlier, the installation should proceed normally: adobe photoshop elements 9 serial number mac install
Option B: Use Adobe's Online Services (Compatibility Mode) Adobe has an online version of Photoshop Elements available for users who have older serial numbers, though this typically applies to Elements 7 and later.
If you are on an older Mac (High Sierra or Mojave), macOS will block the installer. Go to System Preferences > Security & Privacy > General and allow apps from "Anywhere" or right-click the installer and select "Open." If you uninstalled Elements 9 but still have
Before you even attempt the installation, you must understand a critical technical reality. Adobe decommissioned the activation servers for Creative Suite 3, 4, and Elements versions 8, 9, and 10 around 2019. This means that even if you have a valid, legal serial number, the software will fail to "phone home" to Adobe for verification during the install.
When you enter a legitimate Adobe Photoshop Elements 9 serial number on a Mac, the installer attempts to connect to activate.adobe.com. That server no longer responds. Consequently, the installation either hangs indefinitely or throws a generic error like: Option B: Use Adobe's Online Services (Compatibility Mode)
Because the server is down, the installer will eventually display an error. You must call Adobe Customer Care (use their chat or phone support). Ask for the "Legacy Activation Response Code." You will provide them with the "Request Code" shown on your screen. They will generate a "Response Code" to type in. Without this, the installation will revert to a trial or lock you out.
Adobe Photoshop Elements 9 was a landmark release. It introduced the "Guided Edits" mode (object removal, picture stack, and depth of field) and was the last version before Adobe moved entirely to a Creative Cloud subscription model for its professional tools. For many hobbyists, PSE 9 was a one-time purchase that "just worked."
However, because Adobe no longer supports this version, obtaining a valid Adobe Photoshop Elements 9 serial number for Mac install is difficult. Users typically fall into three categories: