OS X Yosemite 10.10.3 - Photos Version 1.0 - Looks like Apple removed the option to show the photo in Finder.
Not the most direct method, but try this:
Go to Photos Menu -> Preferences -> General
Click the "Show in Finder" button in the dialog box. In Finder you'll see a "Photos Library" highlighted
Right-click and select "Show Package Contents", this ...
With the iPhone plugged in, open the Image Capture app on your Mac. In the Image Capture window, left lower corner, choose which app should automatically open when you plug in your phone, chose "no application"
Once you are certain you are happy with Photos, & you are certain the Library has migrated successfully, you can delete the old iPhoto app & iPhoto Library if you wish.
The Library, as you mentioned, is 'virtual' as both are hard linked to the same files. Deleting either Library will not delete the pictures, only deleting both Libraries will do that....
Your iMac is currently processing the photos in your Photos library, presumably because you’ve just imported/converted an existing Photos library from an earlier version of macOS.
If you suspect this has been the cause of your sluggishness for a couple of days, then it’s most likely you’ve got a very large photo library and that it’s being processed for the ...
You can use the command line tool imagemagick to convert HEIC images to JPG.
# install imagemagick
brew install imagemagick
# convert a single image
magick convert foo.HEIC foo.jpg
# bulk convert multiple images
magick mogrify -monitor -format jpg *.HEIC
While in Edit mode, hold down the Control and M keys.
This will show you the original version of your photo, with no edits applied. If you want to temporarily undo the effect of the color adjustments but keep the cropping and rotation the same, hold down M by itself.
It doesn’t work in “view mode”; you have to be in edit mode. (To get ...
Quit Apple Photos. Now run Activity Monitor, look for Photos Agent, and kill it by selecting and clicking the X at the top left.
Now, start Apple Photos again. This will restart Photos Agent, and after a minute, you should see your updated shared albums.
If you like the command line or need to have all devices not open rather than manage each single device as it connects and then after Photos has already opened, try:
defaults -currentHost write com.apple.ImageCapture disableHotPlug -bool YES
This sets a flag to tell the system to not activate ImageCapture or Photos or iPhoto when a hot plug of an iOS ...
For more recent versions of Photos.app (Version 2.0 that came with macOS 10.12 Sierra at least), there is a "Places" item avaialble under "Albums" in the sidebar (use "View" -> "Show Sidebar" if it is not visible). This gives a map view similar to that available in iPhoto.app.
For older versions of Photos.app, it does not appear that there is a way to see ...
I wasn't sure if this was possible, but I'm please to report that it is, and I'm going to use it myself. The trick is to understand that Photos Library.photoslibrary is a Package File that Google Photos Backup doesn't know how to see inside. However, Finder does. So, right click on Photos Library.photoslibrary (normally inside your Pictures folder) and ...
To fill color using instant alpha:
Select the area with instant alpha.
Press delete. If asked to save as png click yes. This makes a picture with the instant alpha areas transparent.
Selection all (entire picture) and copy.
Paint a rectangle of desired color over instant alpha areas.
Click paste. This puts back in the picture with transparent instant alpha ...
In OS X 10.10's Photos application, location information is read-only.
Photos reads GPS coordinates from image files during import and displays the location in the Info window. It can also show photos belonging to a collection or moment on a map. The "Photos Help" puts it this way: "If your camera has GPS capability (as iPhone does), or you’ve added GPS ...
Photos does not actually move the files or duplicate them when importing from an existing iPhoto or Aperture library. It simply creates hard links to the files in their original location from the new Photos library.
See how Photos saves disk space on Apple's site.
More on hard links from Ars Technica:
A hard link is simply a reference to some data on ...
You can change the library location from the Preferences window on the General tab. Photos > Preferences... and select the General tab.
At the top where it says Library Location: click the Show In Finder button:
In the Finder window that opens, move the Photos Library.photoslibrary to the place where you'd rather it exist. This can take some time if it'...
There are currently no settings that allow synchronization of this data.
Macworld speculates on the reason behind it:
It’s not clear yet whether [facial recognition data will ever sync] because Apple’s push at its recent  Worldwide Developers Conference was for local analysis of private information that’s never uploaded to the cloud.
I haven't ...
I'd say stick to the iPhoto Library if that's the app you're going to continue using for now.
When you eventually swap to Photos, do the import again.
The Photos Library is greyed out if you attempt to open it from iPhoto. Any changes you make to the iPhoto Library will not be reflected in the Photos Library, meaning you'll gradually go out of sync until ...
As an alternative to the solutions described in the other answers, you may drag-and-drop from Photos to, e.g., the Finder by holding the alt key. Doing so will cause the original to be copied instead of the converted version. This works both for photos and videos.
If you simply want the entire Masters structure copied to a new drive, then
first find your iPhoto or Photos Library file. Default location for both is ~/Pictures/
Right click the Library file & select Show Package Contents - that will expose the 'file' as the folder it really is.
The Masters folder should be just inside. You can copy that to anywhere.
On your iPhone or iPad, click open an album you've created (won't work on albums iOS creates). Click Select in the upper right corner. Hold down the picture you want as your cover photo, until it "moves" or gets slightly bigger. Then slide it to the upper left position (first picture). Click Done and it's saved as the cover picture.
This answer assumes:
your iPhone is not jailbroken and therefore does not have jailbroken options
your MacBook is running macOS 10.10 or later
that you have iTunes installed on your MacBook
that you don't mind purchasing some software that can help you do this (and more).
You can download/purchase Macroplant's iExplorer software. This software has been ...
The answer appears to be "Yes, it can". After a month of the folder not being touched I finally deleted it and it hasn't caused any issue whatsoever. However, if any device using your iCloud account is still using Photo Stream (for whatever reason), you may still need the folder.
Check Preferences > General > Importing and see if the "Copy files" checkbox is checked.
If it is not: you have a referenced photo library. This means that all of your photos stay in their original locations when added to Photos. All that Photos does is make thumbnails and catalog the metadata so you can view your library. Therefore, Show Referenced File in ...