Q: Delete iPhoto library after installing El Capitan?

After it’s been imported, it’s not. Note that the media files are hardlinked, so deleting either one won’t free up nearly as much space as it looks like it will.

(134626)

Yes you can delete the iPhoto library

no it is not being used by Photos

BUT - it is a really bad is a really bad idea to delete it since you may need or want it and it will save very  little space - https://support.apple.com/en-us/HT204476

It is by fare best not to delete it - if you choose to be positive that you have a good, tested archive in case you need it later

LN

No

There is no connection between the Photos library and the iPhoto library - each is totally independent - the original photos and previews are had linkes to each libary and deleting either library deletes only the hard links - nothing changes in either library or with disk space

LN

You are welcome

LN

I need to recover some space, they are taking up a huge amount of my HD on my macbook air, which i use for travel and dont require all the photo history.

Do i disconnect it from icloud?

Delete both? Photos and Iphoto?