El Capitan degrades the OS functionality

I installed El Capitan 10.11.2. Update went well, no problem. Since then, however...

Scanner CanoScan 4400f is no longer supported. Canon 5 d mk3 camera is no longer recognized and Photos usurps my favorite Adobe Bridge and Adobe Downloader. Office 2011 for the freeze, especially Excel. Drives external hard not eject properly. Looks like an old Windows machine now. No warning before the update of devices may no longer work.

All solutions, or any way to roll back to the Mavericks? I had not bothered with an upgrade to Yosemite and with an old computer thought that the installation of El Capitan can be the last OS update I'm likely to be able to do.

2008.2.8GHz end of the MacBook Pro Intel Core Duo. 8 GB of memory. 320 GB of storage.

To check compatibility first before upgrading:

Adobe Bridge CS5 is compatible (2-5, or 6: unknown, probably)

MS Office 2011 is compatible.

When you load the latest Canon drivers: compatible.

You have software in SystemPreferences-> users & groups-> LoginItems?

If Yes: delete all, with the sign less below.

Reboot and see if it's better, start one app in time to see how it works.

Tags: Mac OS & System Software

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