how to get 64 bit support for iPhoto

Like Niel said:

"Open Photos from the Applications folder or the Dock with the Option key held down, click on Other Library, and choose the iPhoto one."

Photos will create a new Photos library with all your iPhoto media.

k5g7r wrote:

After iPhotos switched to Photos I lost all the Pictures were in Photos . I nee my old pictures in Photos back . How to get them ?

So now you have two libraries:

Hold down the option (or alt) key and launch Photos. From the resulting menu select 'Choose Library' and open the one you want.

iPhoto depends on a 32-bit library, even if the application itself is 64-bit. If you're using Catalina, you need to switch to Photos or a non-Apple product.

(184065)

Open Photos from the Applications folder or the Dock with the Option key held down, click on Other Library, and choose the iPhoto one.

(184069)