Note:

Looking for information pertaining to the most current version of Photoshop CC? See Downloadable plug-ins & content.

Photoshop CS5 on Mac OS was reworked on a fundamental level to run as a 64-application under the 64-bit versions of Mac OS. Therefore, old and 32-bit plug-ins don't run, can return errors, or cause crashes when you use them in the 32-bit or 64-bit versions of Photoshop. See below for instructions on how to open Photoshop CS5 in 64-bit and 32-bit modes.

Confirm that third-party plug-ins are compatible

As with all previous versions of Photoshop, don't copy old third-party plug-ins, or plug-ins from previous versions of Photoshop, into the Photoshop CS5 plug-ins folder. If you have set the Additional Plug-Ins Folder in the Plug-Ins preferences to a folder, deselect this option. Or, make sure that all the plug-ins in this folder are compatible with Photoshop CS5. Contact third-party plug-in manufacturers for versions of their plug-ins that are compatible with Photoshop CS5, either 32 bit or 64 bit.

Plug-ins available via web download

Some plug-ins that were available for previous versions of Photoshop are no longer available for CS5. Others are available as a web download, but are not installed by default. The plug-ins available via web download are bundled together.

Download the optional plug-ins from these locations:

For Mac OS: http://www.adobe.com/support/downloads/detail.jsp?ftpID=4965
For Windows: http://www.adobe.com/support/downloads/detail.jsp?ftpID=4688

Note: Review the ReadmeCS5_Optionalplugin.pdf file in with the downloaded files for installation instructions.

Plug-ins supported in 32- and 64-bit Windows, and only 32-bit Mac OS

See below for instructions on how to open Photoshop CS5 in 64-bit and 32-bit modes.

Plug-ins no longer supported in Photoshop CS5

  • Filmstrip format. Previous versions don't work in Photoshop CS5.
  • Texture Fill

Plug-ins supported only in 32-bit Windows and Mac OS

  • Send Video Preview to Device
  • Video Preview

See below for instructions on how to open Photoshop CS5 in 64-bit and 32-bit modes.

Plug-ins available via web download—supported in 32- and 64-bit Windows and Mac OS

  • Alias
  • ElectricImage
  • SGIRGB
  • Softimage
  • Unlimited Preview Size
  • HSBHSL
  • Embed / Read Digimarc Watermark

Plug-ins available via web download—supported in 32- and 64-bit Mac OS

  • DisableGetInfoComment
  • DisableScratchCompression
  • ForceVMCompression
  • ForceVMBuffering
  • DisableVMBuffering
  • RememberSlowFiles
  • UnlimitedClipboardSize
  • Overscroll Always
  • Overscroll Floating Windows

Plug-ins installed in CS5, optional in previous versions

  • JPEG2000

Other changes

  • Tool presets are no longer backward compatible.
  • TWAIN: The TWAIN scanner plug-in is no longer installed with Photoshop CS5, but is available via web download. Supported when running Photoshop CS5 on 32-bit Windows or 32-bit Mac OS. Also supported as a 64-bit application on 64-bit Mac OS with scanners that support 64-bit scanner drivers. The TWAIN scanner plug-in is also supported if you run Photoshop CS5 as a 32-bit application on 64-bit Windows or 64-bit Mac OS. For more information, see TWAIN plug-in | Photoshop CS4, CS5 (kb405072).
  • Legacy droplets not supported in Mac 10.5, 64 bit. Rosetta required to run droplets.

 How to run Photoshop CS5 in 32-bit and 64-bit modes

Run Photoshop CS5 on Mac OS as a 32-bit application:

  1. Select the Adobe Photoshop CS5 application file, installed by default in the Applications/Adobe Photoshop CS5 folder.
  2. Choose File > Get Info, and select Open in 32-Bit Mode.

Get Info to Enable 32-bit Mode

Deselect this option to run Photoshop CS5 in 64-bit mode.

Run Photoshop CS5 in Windows as a 32-bit application:

  1. Close Photoshop CS5.
  2. Navigate to the Program Files (x86) > Adobe > Adobe Photoshop CS5 folder..
  3. Double-click the Adobe Photoshop CS5.exe file.

Run Photoshop CS5 in Windows as a 64-bit application (if your version of Windows and your hardware supports 64 bit):

  1. Close Photoshop CS5.
  2. Navigate to the Program Files > Adobe > Adobe Photoshop CS5 folder.
  3. Double-click the Adobe Photoshop CS5.exe file.

 

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