If you can't install macOS Catalina, you might be able to install an earlier macOS, such as macOS Mojave, High Sierra, Sierra, El Capitan, or Yosemite. Or create a bootable installer disk, then use that disk to install macOS on your Mac or another Mac.
Safari User Guide
Safari can download most types of files, but if you have trouble with a file, try these suggestions.
- Note: For Mac High Sierra (10.13.x), you will need to click on Allow too. Click the lock icon again to prevent any further changes. Installing the Zoom application. Visit our Download Center. Under Zoom Client for Meetings, click Download. Double click the downloaded file. It is typically saved to your Downloads folder.
- TeamViewer Host is used for 24/7 access to remote computers, which makes it an ideal solution for uses such as remote monitoring, server maintenance, or connecting to a PC or Mac in the office or at home. Install TeamViewer Host on an unlimited number of computers and devices. As a licensed user, you have access to them all!
- If you are already running Docker on your machine, first read Docker Desktop for Mac vs. Docker Toolbox to understand the impact of this installation on your existing setup, how to set your environment for Docker Desktop on Mac, and how the two products can coexist. Relationship to Docker Machine: Installing Docker.
If Safari is still downloading the file, wait for it to finish. You can’t open a file while it’s being downloaded.
If the download is paused, resume it. Show the downloads list by clicking the Show Downloads button , then click the Resume button for the paused download.
If you see a message that the app can’t be opened because it’s from an unidentified developer or wasn’t downloaded from the Mac App Store, you can open the app by overriding the settings in Security & Privacy preferences.
Sometimes a download is incomplete because the file was damaged. Try downloading it again.
Make sure you have the app needed to open the file. If you do, the file may have been corrupted during the download. Delete it, then try downloading it again.
The downloaded file may be a compressed archive or disk image that contains the file you want. If the file is from a trusted site, double-click it to decompress it.