Mac Pro running very slow after El Capitan install

My portable Mac Pro (before mid-2013) was working fine until I installed 3-weeks to El Capitan. Now the spinning color wheel open almost all the time when I switch to another operation.

Run and view the results here so that we know more about your configuration.

EtreCheck

This is the Office Mac Pro forum. I asked that your post be moved to the MacBook Pro laptop forum.

Tags: Notebooks

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    ST1000LM024 disk HARD APPLE disk0: (1 TB) (rotation)

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    Recovery HD (disk0s3) < not mounted > [recovery]: 650 MB

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    Apple Inc. BRCM20702 hub.

    Apple Inc. Bluetooth USB host controller.

    Apple Inc. FaceTime HD camera (built-in)

    Apple Inc. IPhone.

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    Apple Inc. Thunderbolt_bus.

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    Mac App Store and identified developers

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