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How long does it take to install Mac OS X Lion?
30 to 60 minutes
The operating system takes 30 to 60 minutes to install, so now might be a good time to take a coffee break. When the install is finished, your Mac restarts itself. If you were reinstalling OS X on a hard disk that it had been installed on previously, you’re done.
Why can’t Mac install Lion?
This error can occur if your startup drive is a RAID volume or has a “non-standard” Boot Camp partition. If you ever need to boot from Recovery HD, you do so from the partition on the external drive. Install failed. Mac OS X Lion couldn’t be installed, because the disk (volume name) is damaged and can’t be repaired.
Why won’t Mac OS X install?
If macOS still won’t install properly, you might need to reinstall the whole operating system instead. You can do this using Recovery Mode on your Mac. Restart your Mac and hold Option + Cmd + R while it powers on. Click Reinstall macOS to install the latest version of macOS.
How long does macOS installation take?
How Long Does the macOS Sierra Update Take?
| Task | Time |
|---|---|
| Backup to Time Machine (Optional) | 5 minutes to a day |
| macOS Sierra Download | 1 hour and 15 minutes to 4 hours. |
| macOS Sierra Installation Time | 30 to 45 minutes |
| Total macOS Sierra Update Time | 1 hour 45 minutes to four hours |
Why my Mac is not updating?
There are several reasons you might be unable to update your Mac. However, the most common reason is a lack of storage space. Your Mac needs to have enough free space to download the new update files before it can install them. Aim to keep 15–20GB of free storage on your Mac for installing updates.
How do I reinstall Mountain Lion on my Mac?
Reinstalling Mountain Lion
- Restart your computer, and immediately hold down command-r until the gray Apple logo appears.
- If prompted, select your main language and then click the arrow.
- Click Reinstall OS X, and then Continue.