How to upgrade my operating system to Yosemite on a MacBook Air running Lion 10.7.5? I don't have 2 GB of free memory.

How to upgrade my operating system to Yosemite on a MacBook Air running Lion 10.7.5? I don't have 2 GB of free memory.

Assuming that you previously purchased on the app store and your Mac meets the minimum requirements, unload you enough data on an external drive to free the necessary disk space and update via the app store. If you buy before it and it is not in your shopping list, you do not have.

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    Start by creating a recovery kit. See the following link for the procedure:

    HP computers - create a recovery Disk Image or save an Image recovery on a USB (Windows 8)
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    Hello Mohan,

    Thanks for posting your query in Microsoft Community Forum.

    I can of course understand the situation and will be happy to help with your query.

    Let me ask you;

    • You have the key product for Windows 8 or 8.1?

    You can create an installation media (DVD/USB) for Windows 8.1 and re-install when you want. However, in order to create an installation media for Windows 8.1, you need the product key. If you don't have the product key for Windows 8.1, you can not create installation media.

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    1. Click on the USB flash drive.

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      If you have files on the USB flash drive, it will remove them.

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    1. Click on the ISO file , and then select the location where to save the ISO file.

    2. Insert a blank recordable DVD into your DVD drive.

    3. Burn the ISO of the DVD file using Windows disc Image burner, or another program DVD burning.

    Note: Ensure that the USB or DVD key that you use has nothing else stored on it and has a sufficient free space to download the Windows 8.1 Installer: about 2.3 GB for the 64-bit version.

    You can also read the article below to create a USB stick recovery.

    Create a recovery USB disk

    Hope this information is useful. Please feel free to answer in the case where you are facing in the future other problems with Windows.

    Thank you.

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