If you’re using the new Photos app on your Mac instead of the older iPhoto app, you most likely have a duplicate photo library floating around on your hard drive. For a lot of people, that could mean gigs and gigs of wasted storage space, especially on shared Macs with multiple migrated libraries.
Here’s how to check for multiple libraries and how to delete them…
Reset Photos Mac
Before deleting your old library: Make a backup
Jan 12, 2020 You can access the hidden Library folder without using Terminal, which has the side effect of revealing every hidden file on your Mac. This method will only make the Library folder visible, and only for as long as you keep the Finder window for the Library folder open.
- Aug 24, 2015 To test this theory, I deleted my iPhoto library on my other Mac to see how much storage was freed up. For those wondering, my iPhoto library was 35.99 GB and my Photos library was 41.16 GB. You can see the before and after results on my hard disk space below. I was able to.
- Oct 12, 2018 Sometimes It’s Better to Just Start Over With iCloud Photo Library Syncing Friday, 12 October 2018. Early this week I noticed that I wasn’t able to use the Instant Hotspot feature with my iPhone XS. That’s the feature where you can leave the cellular hotspot turned off in Settings, but enable it on-the-fly from a Mac when you connect via the Wi-Fi menu.
- Apr 17, 2019 Close Photo Library on Mac. You can also remove the program from Dock on your Mac. After that re-launch Photos Library by holding Command and Option keys. There is a popup window for Repair Library, click the Repair option to repair the photos library in order to recover Photo Library on Mac for the lost photos.
- Oct 12, 2018 A side effect of signing out of and back into iCloud is that it seemed to reset my iPhone’s photo library sync state. It didn’t delete my photos, but once I was signed back in to iCloud, the Photos app was trying to re-upload my entire library (over 28,000 photos and 1,100 videos) back to iCloud.
While the Photos app should have imported all your photos and videos just fine, I always recommend having backups handy. Perhaps you’ll delete an old photo by accident at some point and want it back later. If you have a copy of your old iPhoto library still handy, you can pull it form there as a last resort.
I saved my old iPhoto library to my Dropbox account. You can of course use any service of your choice, or just drop it onto an external hard disk you have laying around. Regardless of how you do it, I’d highly recommend saving a copy before deleting it.
Once you’ve backed up your old iPhoto library (if you chose to do so), you can proceed with deleting it:
- Open a new Finder window on your Mac.
- Click on Pictures in the left hand navigation. If it isn’t there, just search for your pictures folder using Spotlight.
- You should see two libraries, one is your old iPhoto Library and one is your new Photos library.
- Move your iPhoto Library to your trash can and empty it.
Check the storage space on your Mac, you should notice that you have more storage space available. If you are on a shared Mac and have multiple user logins, everyone using the new version of Photos on that Mac should make sure they don’t also have duplicate libraries.
I’m not sure why Apple doesn’t create a process to delete old versions of libraries after migrating to Photos, but they should. Until that happens, you’ll have to delete your old library manually.
The GNU Scientific Library (GSL) is a numerical library for C and C programmers. It is free software under the GNU General Public License. The library provides a wide range of mathematical routines such as random number generators, special functions and least-squares fitting. There are over 1000 functions in total with an extensive test suite. GSL CBLAS Library; GNU General Public License; GNU Free Documentation License; GSL. Docs » GNU Scientific Library; View page source; Next. GNU Scientific Library. 2012-12-31 Installing GSL in Mac OS X (version 10.7.5 ) の記録. GitHub Gist: instantly share code, notes, and snippets. GSL - GNU Scientific Library - GNU Project - Free Software Foundation (FSF) ライブラリの使用方法についてはmanual.
Give this tip a try and see how much storage space you were able to clear up. As you can see in the screens above, my old iPhoto library was over 30GB, which was definitely a healthy chunk of hard drive space that I now have back.
Your Mac storage tips?
This is one of many ways to regain storage space on your Mac without having to sacrifice losing data. But we know there are lots of others. What are some of your favorite Mac storage tips for recapturing space? We’ve love to hear them in the comments!
Update
A follower on Twitter referenced to me an article written on Six Colors pointing out that the library is actually hard-linked between versions. While this may be true when you first migrate, it seems that if you make any changes to any files and the libraries become different, splicing can and will occur.
To test this theory, I deleted my iPhoto library on my other Mac to see how much storage was freed up. For those wondering, my iPhoto library was 35.99 GB and my Photos library was 41.16 GB. You can see the before and after results on my hard disk space below. I was able to free up over 20 GB of space. So I’m not sure what I think about hard linking or how well it’s actually working between Photos and iPhoto.
Reset Mac Photos Library
Bottom line, if you’re short on storage space and you want to free some up, there’s really not much point in having two photo libraries floating around on your Mac. Hard linking or not, deleting the old library will free up space in almost every case.