I need to update my iPad mini 4 to latest OS

The iPad mini4 is capable of update to iPadOS 15.8.x; the mini4 fundamentally does not support iPadOS16 or later. If you need a more recent version of iPadOS than your iPsd is capable, you have no alternative other than to replace your iPad with a much newer or current model iPad.

Whether or not you are able to update any iPad to a newer version of iOS/iPadOS will be dictated by the iPad model - and the currently installed version of iOS. You can find this information here:

Settings > General > About

Not sure which iPad you have? Identify your iPad model.

Here is a list of the highest version of iOS supported by the older models of iPad (for simplicity - “generations” are shortened to a number) that are restricted in their ability to be updated:

32-bit devices (obsolete)

iPad1 - iOS 5.1.1

iPad2, iPad3 and iPad mini1 - iOS 9.3.5 (WiFi Only models), iOS 9.3.6 (WiFi+Cellular)

iPad4 - iOS 10.3.3 (WiFi Only), iOS 10.3.4 (WiFi+Cellular)

64-bit devices

iPad Air1*, iPad mini2 and iPad mini3* - iOS 12.5.7

iPad Air2, iPad mini4 - iPadOS 15.8.3

iPad5, iPad Pro (9.7"/12.9" first generation) - iPadOS 16.7.10

(*) obsolete

Newer models are all able to be updated to the current version - iPadOS 17.6.1

• iPad Pro 13" (M4)
• iPad Pro 12.9" (2nd generation and later)
• iPad Pro 11" (1st generation and later + M4)
• iPad Pro 10.5"
• iPad Air (3rd generation and later + M2)
• iPad (6th generation and later)
• iPad mini (5th generation and later)

ipad mini 4 can't be updated higher than

Current: iPadOS 15.8.3, released July 29, 2024[1]

iPad Mini 4 - Wikipedia

this is the way you update an ipad

Update your iPhone or iPad - Apple Support