OpnEarth
Desktop viewer
Drag the file in and it opens in seconds, styled exactly as the sender made it. Works offline, needs no setup, and answers your questions with AI.
OpnEarth is a desktop globe for KML and KMZ files that runs natively on Apple Silicon and Intel Macs. Drag a file onto the window and it draws with the sender's styling. Big maps open in seconds: a 56 MB KMZ archive containing about 374 MB of uncompressed KML in 3.5 seconds on a high-end Mac.
macOS 13 Ventura or later · Apple Silicon and Intel · System requirements · On Windows?

Quick Look
Select a KML or KMZ file in Finder and press Space. The map appears right away, with its places, lines and areas counted, where it sits and its folders.

What's happening
Google is ending support for the Earth Pro desktop app on macOS. An existing install may keep launching for a while, but it will not be maintained. For many people in telecom and utilities, it was the easiest way to open a large KMZ of fibre routes or site plans and look at it.
KML and KMZ are open formats, so the files stay readable. What you need is a viewer that handles them at that size on a current Mac. OpnEarth runs on macOS and Windows, and on the same Windows PC it opened a big carrier KMZ about 4 times faster than Google Earth Pro (7.6 against 30.4 seconds).
3.5 s
Opens huge maps
56 MB KMZ archive; about 374 MB of uncompressed KML.
Universal
Apple Silicon and Intel
One download runs on both. Code signing is planned.
No cap
On file size
Even in the free Lite edition.
Offline
For local files
Local files open with the Wi-Fi off.
Alternatives
The usual suggestions for replacing Google Earth Pro on a Mac, for the job it did best: opening a big KMZ someone sent you.
Desktop viewer
Drag the file in and it opens in seconds, styled exactly as the sender made it. Works offline, needs no setup, and answers your questions with AI.
Google, in a browser
Free, and it has Google's imagery. It runs in a browser with a connection, and it refuses any import over 250,000 vertices.
A full GIS
A powerful GIS for analysts. Opening a KMZ takes an import and some restyling first.
Windows only
ArcGIS Pro is a Windows application, so a Mac needs a virtual machine to run it. It is a large paid GIS, which is more than you need to look at a KMZ.
On the Mac
Besides KML and KMZ, it opens the other map, spreadsheet and drawing files vendors send.
Open a file with ⌘O or by dropping it on the window. Your open documents are listed in a sidebar you can resize, and reopening a file puts the camera back where it was.
Map labels and lines are drawn at the full resolution of the screen, so small carrier labels stay readable.
When a new version is ready, one click installs it and OpnEarth reopens as the new version. Updates are signed, and one that fails the check is refused.
Files from vendors are read by a sealed-off reader that cannot touch the rest of your Mac, and it is tested against broken and hostile files.
Local files open with no network connection. Sharing a map on the web, a Pro feature, uploads the geometry and the attributes you pick. The KMZ you were sent is never uploaded.
FAQ
Five common questions about replacing Google Earth Pro on a Mac.
Yes. Google is ending support for the Google Earth Pro desktop app on macOS. OpnEarth opens the same KML and KMZ files on a current Mac.
OpnEarth. It runs natively on Apple Silicon and Intel Macs, opens big KMZ files in seconds with the sender's styling, and needs no setup.
Yes. KML and KMZ are open formats, and OpnEarth opens them with their styles, folders and pop-up balloons intact.
Yes. One universal app runs natively on Apple Silicon and Intel Macs. On a high-end Mac it opens a 56 MB KMZ archive containing about 374 MB of uncompressed KML in 3.5 seconds.
OpnEarth comes with open satellite imagery and elevation that you can use for work. Google's own imagery is licensed to Google's apps only.
We let people in one group at a time. Request access and we will email your download link when your group opens.
macOS 13 or later. We email you when your turn comes.