Photos keeps crashing at launch

Hi!

I am facing an odd behavior on a macbook pro Retina early 2015 running macOS 10.12.4.

Each time Photos 2.0 is launched, whatever the chosen photolibrary (system or simple), it crashes and is immediately and automatically relaunched. As a result the starting Photos is always grabbing the focus and it is almost impossible to get back the control of the computer without rebooting it.

Each launch generates similar entries in the system logs:

par défaut 14:12:03.653037 +0200 mobileassetd 0x7f95bbd0c190 Client connection: XPC_TYPE_DICTIONARY <dictionary: 0x7f95bbd0c190> { count = 3, transaction: 1, voucher = 0x7f95bbe04030, contents =

"DaemonConfigKeys" => <array: 0x7f95bbc066d0> { count = 1, capacity = 2, contents =

0: <string: 0x7f95bbc117f0> { length = 32, contents = "NonUserInitiatedDownloadsAllowed" }

}

"_IPC_TYPE" => <uint64: 0x7f95bbc11930>: 24

"ClientName" => <string: 0x7f95bbc114d0> { length = 6, contents = "Photos" }

}

par défaut 14:12:03.655316 +0200 Photos 0x60000014e020 Daemon configuration query reply: XPC_TYPE_DICTIONARY <dictionary: 0x60000014e020> { count = 2, transaction: 0, voucher = 0x0, contents =

"Dictionary" => <dictionary: 0x60000014e0d0> { count = 1, transaction: 0, voucher = 0x0, contents =

"NonUserInitiatedDownloadsAllowed" => <int64: 0x6000002365e0>: 1

}

"Result" => <int64: 0x600000236600>: 0

}

par défaut 14:12:03.656051 +0200 mobileassetd 0x7f95bbe0cf50 Client connection: XPC_TYPE_DICTIONARY <dictionary: 0x7f95bbe0cf50> { count = 5, transaction: 1, voucher = 0x7f95bbd070a0, contents =

"AssetType" => <string: 0x7f95bbe14600> { length = 34, contents = "com.apple.MobileAsset.MediaSupport" }

"Local Cache Only" => <bool: 0x7fffeb500ac8>: false

"Timeout" => <double: 0x7f95bbe00eb0>: 15.000000

"_IPC_TYPE" => <uint64: 0x7f95bbe04f30>: 13

"ClientName" => <string: 0x7f95bbe10290> { length = 6, contents = "Photos" }

}

par défaut 14:12:03.711948 +0200 PhotosRelauncher App to relaunch:file:///Applications/Photos.app/, library:file:///Users/xxx/Library/Containers/com.apple.Photos/Data/Pictures/Pho tothe%CC%80que.photoslibrary/

par défaut 14:12:03.712020 +0200 PhotosRelauncher Launch with library url.

Has anyone ever seen such behavior? Any idea to solve this very annoying issue?

Thanks by advance for your help!