struggling to update the software on my macbook

Crushed MacBook due recharge mac os to snow leopard. I was running yosemite I can not at the same if I use time machine

I do not quite understand your question, but it seems you want to return to Yosemite in Snow Leopard.

First of all, you have a Time Machine backup, you did in OS X Yosemite? If so, it is as simple as restoring the backup. To do:

  1. Connect the external drive with the backup Time Machine.
  2. Hold down the ALT key during start up your Mac to the top and choose your external drive to boot from OS X Recovery.
  3. Choose the option to restore a Time Machine backup and follow the steps.

This option will erase your hard drive and restore all data from this backup.

If you do not have a backup, you will need to upgrade to OS X Yosemite:

  1. Go to menu-> Software Update Apple and install all available updates.
  2. After updating to Mac OS X, open the Mac App Store, go to purchases and download the installer for OS X Yosemite (if available).
  3. The installation program opens automatically when the download is complete, then follow its steps to upgrade to Mac OS X.

You have the option to upgrade to OS X El Capitan instead (the latest stable version of OS X), if you wish. You can download it from the Mac App Store for free.

Tags: Mac OS & System Software

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