can I import my old aperture library from a external hard drive to my new MacBook Air or my new iMac with Ventura on it

To import your Aperture library from an external hard drive to your new MacBook Air or iMac with Ventura:

• Connect the external hard drive to your new Mac.
• Open Ventura and look for the "Import" or "Import Library" option.
• Select the Aperture library file on the external hard drive and initiate the import process.
• Once the import is complete, you can access your Aperture library in Ventura on your new Mac.

Remember to keep a backup of your original Aperture library before importing it into Ventura.

With Ventura's Photos V 8.0 you can import the photos from an Aperture library into a Photos library. However, you won't get the folder organization that you had in Aperture. You can keep the organizational structure is you use the paid version of PowerPhotos to merge the Aperture library into your Photos library. Here are the differences between the two apps regarding merging/importing:

If you have a lot of organizational effort in your Aperture library you might want to use the paid version of PowerPhotos to merge the Aperture library into your current Photos library.

 I ran a number of tests with a 50 photo Photos library with keywords, captions, keywords and locations.  I merged it into an empty library using Photos and PowerPhotos.  This is what I found was imported by each;

PowerPhotos:                                      Photos:

Albums                                               -----------

Captions                                             Captions

Titles                                                   Titles

Original images                                  Original images

Edited images                                     Edited images

---------------                                        Locations

Favorites                                             Favorites

Can detect and exclude                      Duplicates

duplicates or not

Neither method included projects. 

Both methods could import older iPhoto libraries into a Photos library when the iPhoto library couldn't be migrated into a Photos library.