Wait for the copy progress bar to complete, then unmount/eject the disk image from your desktop. Step 3: Configure Settings for Stability
: Yosemite machines typically have less RAM. Keep your open tab count low to prevent system lockups.
Enter . While Mozilla has officially moved on to newer versions of macOS, you can still get a functional, stable version of Firefox for your Yosemite machine. Here is everything you need to know to get back online. The Best Version for Yosemite: Firefox 78 ESR firefox download for mac 10105 upd
Apple launched OS X Yosemite 10.10.5 in 2015 to fix core system bugs. Over time, changes in web technologies and security requirements meant that major browser developers had to shift their resources toward newer operating systems.
As of late 2024,
To run Firefox on OS X 10.10.5, you must install , which is the final, absolute update compatible with this specific operating system. The Evolution of Firefox Compatibility for OS X 10.10.5
Right-click (Ctrl+click) the Firefox app → Open → Click Open in the dialog. Or run in Terminal: Wait for the copy progress bar to complete,
If your Mac runs macOS 10.12 Sierra (or 10.13/10.14), you have more time, but support is still ending soon.
Even though Firefox generally runs smoothly on macOS 10.15, you may encounter occasional issues. Here are some common problems and their solutions. The Best Version for Yosemite: Firefox 78 ESR
Running Firefox on Mac OS X 10.10.5 (Yosemite) If you are using a classic Mac running OS X 10.10.5 (Yosemite)