Apple has improved security by introducing their new 'V2 code signing' (it is a way to guarantee that the application came from the developer and has not been altered, infected with a virus, or damaged in any way). While Adobe is signing future updates with V2, some applications that are signed with the older V1 code signing may issue a warning: '<Adobe application> can’t be opened because the identity of the developer cannot be confirmed.' Learn more.

When using Mac OS X 10.10 with Safari 8, PDFs do not open using the Adobe Acrobat or Reader PDF browser plug-in. When opening a PDF in a browser, Safari's PDF Preview is the default PDF viewer. Explicitly set the Adobe plug-in as the default PDF viewer. Learn more.

In our testing, we found no other significant issues with running Creative Cloud products with Mac OS X Yosemite.

When using Lightroom with Mac OS X 10.10, the Map module loads slowly or partially on some low-bandwidth Internet connections or the following error appears: 'Sorry, we have no imagery here.' Learn more.

New Here, Sep 28, 2015. Copy link to clipboard. I have a Macbook Pro with OS X Yosemite 10.10.5. I have tried updating Adobe Flash Player 19 and was unsuccessful. It fails at the 90% mark every time. I have already done the uninstall and clean installation troubleshooting steps on Adobe, to no avail.

Creative Cloud

• In some instances, the Adobe Creative Cloud desktop application encounters an “incompatible software error” and requires a workaround. For the latest information, see 'Incompatible Software' error | Mac OS X Mavericks (10.9).

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Acrobat/Reader

Adobe Flash Player Yosemite 10.10.5 Windows 10

• Acrobat or Reader crashes on using the Find command on Mac OS 10.9.2. See Mac OS X Mavericks (10.9) compatibility or Crash during a text search for additional details.
  
• Safari 7 can block the first attempt to view a PDF using Adobe Reader. Get the workaround at Safari 7 and 6.1 block PDFs.

Photoshop

• Photoshop CC keyboard shortcuts can stop working temporarily when you use a Wacom Tablet. See more details at Menus, shortcuts, Lasso tool, or Photoshop stop working when using a Wacom tablet.
• Photoshop lasso selection tools can close suddenly when you use a Wacom Tablet. See more details at Menus, shortcuts, Lasso tool, or Photoshop stop working when using a Wacom tablet.
  
• Photoshop menus, panels, and dialog boxes can turn white and become unresponsive when you use a Wacom Tablet. Get the workaround at Menus, shortcuts, Lasso tool, or Photoshop stop working when using a Wacom tablet.

Lightroom

• Lightroom 5 sliders look different from sliders in previous versions. See Sliders are white, blue, look different for additional details.
  

Adobe Flash Player Chrome

After Effects

• After Effects CC or CS6 doesn't launch. See Can't launch After Effects for additional details.

Dreamweaver

• Dreamweaver CC becomes unresponsive. See Known issues | Dreamweaver CC 2015 for additional details.

Flash Player

• Adobe Flash Player can require you to remove sandbox restrictions from your Apple Safari player. Learn more at Remove sandbox restrictions.