The issues -- listed by Adobe on its website -- arent as cut and dried as the problem with Flash on iOS, which is that Apple blocks use of Flash on iPhones and iPads.

IN PICTURES: Easiest upgrade ever How to upgrade your Mac to OS X Lion.

In addition to the fact that Lion drops support for older PowerPC applications, the Adobe issues may be enough for some users to delay upgrading.

Software often has to be rewritten to continue working properly on new versions of operating systems, or to take advantage of an OSs new features.

Adobe Reader Lion Mac OS X 10

Adobe doesnt suggest any deliberate attempt by Apple to cripple Adobe products on Lion, but Adobe Senior Product Manager Jody Rodgers blogs, The cat is out of the bag Mac OS X 10.7 aka Lion is roaming the streets and you brave Mac IT admins have been deemed Lion Tamers by the public at large.

Or at least by me.

Adobe Reader Lion Software Publishers That

Ive managed a few OS compatibility assessments in my past and it is no easy task to gather up all the necessary info from the software publishers that are used in your environment, runcoordinate testing, etc.

Known issues in Lion affect Adobe software such as Acrobat, Adobe Drive, Contribute, Dreamweaver, Fireworks, Flash Builder, Flash Catalyst, Flash Player, Lightroom, LiveCycle, Photoshop and Premiere Pro.

Adobe initially said, Flash Player may cause higher CPU activity when playing a YouTube video on Lion.

Possibly related to disabled hardware acceleration, but later retracted this issue, saying, Lion provides the same support for Flash hardware video acceleration as Mac OS X Snow Leopard.

Catalyst CS5.5, the current version, is generally compatible with Lion but issues that degrade user experience caused Adobe to say, We do not recommend that Catalyst CS5.5 customers upgrade to Mac OS X 10.7.

Adobe also updated an FAQ on its Creative Suite to discuss compatibility with Lion.

Lion was unveiled to generally good reviews, with users praising the OS for trackpad gestures that allow iPad -like manipulation of applications, and new Launchpad and Mission Control features that provide more convenient views of applications.

However, some users complain that Lion has slowed their Macs down.

The problem is apparently caused by the Spotlight search function re-indexing the contents of the computer, which slows down the computer for a few hours after installation.

In general, Lion will perform better on newer Macs, particularly those with at least 4GB of RAM and solid state disks.

Adobe Reader Mac Os X Lion