Iphoto Update
How do I update my iPhoto with the 64Bit?
Did I lose all of my photos?
iMac 21.5″, macOS 10.15
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1. You can't. No version of iPhoto will run in Catalina; it requires a 32-bit library.
2. No. Launch Photos with the Option key held down, click on Other Library, and choose the iPhoto one; if you choose to use a non-Apple alternative, check its documentation for instructions on importing the iPhoto library.
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