My mac is stuck on OS X Yosemite 10.10.5 and won’t update past that, no updates on app store no nothing, I recently bought an iPhone x and iTunes won’t let me sync my old iphone back up because it needs an update which i cannot get, its frustrating me, I don’t know what to do anymore, I’ve looked everywhere on the internet and can’t find a solution. Mac OS X Leopard (version 10.5) is the sixth major release of macOS, Apple's desktop and server operating system for Macintosh computers. Leopard was released on October 26, 2007 as the successor of Mac OS X 10.4 Tiger, and is available in two editions: a desktop version suitable for personal computers, and a server version, Mac OS X Server. The update for OS X Lion can be installed through the Mac App Store available on every Mac or Macbook. Apple switched to this form of update from their former update system that was available by checking for updates in the Settings application. Apple strengthened Mac OS X by implementing stack protection, and sandboxing more Mac OS X components such as the H.264 decoder in QuickTime and browser plug-ins as a separate process in Safari. Secure virtual memory was an option in earlier releases on Snow Leopard, but the checkbox to disable it was removed later.
Your Time Machine backup disk might not always be available, so Time Machine also stores some of its backups on your Mac. These backups are called local snapshots.
How to use local snapshots
When your backup disk isn't available, Time Machine automatically uses local snapshots to help you restore files. Reconnect your backup disk to make even more backups available.
Learn how to restore files from Time Machine.
How local snapshots use storage space
You don't need to think about how much storage space local snapshots are using, because they don't use space needed for tasks like downloading files, copying files, or installing new software.
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Your Mac counts the space used by snapshots as available storage. Even so, Time Machine stores snapshots only on disks that have plenty of free space, and it automatically deletes snapshots as they age or as space is needed for other things.
If you want to delete local snapshots manually, turn off Time Machine temporarily:
- Open Time Machine preferences from the Time Machine menu in the menu bar. Or choose Apple menu > System Preferences, then click Time Machine.
- Deselect ”Back Up Automatically” or click the Off/On switch, depending on what you see in Time Machine preferences.
- Wait a few minutes to allow the local snapshots to be deleted. Then turn on Time Machine again. It remembers your backup disks.
How often local snapshots are saved
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Time Machine saves one snapshot of your startup disk approximately every hour, and keeps it for 24 hours. It keeps an additional snapshot of your last successful Time Machine backup until space is needed. And in macOS High Sierra or later, another snapshot is saved before installing any macOS update.