Edit: After half day, my wife’s Mac started having the same problem. I have then applied the solution that I found in the Apple
Have You Checked Your iOS Privacy Settings?
There is a vital feature on our iOS devices that is all too easy to ignore and that is the privacy settings. It may not sound particularly important but chances are your iPhone or iPad is full of all kinds of private data, whether it is personal information or an important document you are working on. It doesn’t matter what exactly that data is however, as the real issue is whether that data is available to others. If it is private then there are steps you need to make to keep it that way.
I can’t speak for everyone but my phone is an important part of my life as I use it for more or less everything, especially staying organised. Calendars, contacts, to-dos and deadlines, it’s all there on my phone because I have a habit of not writing things down, but then who does these days? The problem however is that all the apps you install can actually access a surprising amount of data on your phone and there is nothing to stop it being sent back to the developers. In many cases, the app is trustworthy and it does not use any data you have not permitted it to but there are more malicious people out there trying to dig their way into your device so you need to keep an eye on those privacy settings.
The best place to start of course is the Privacy section, which can be found in Settings. Here you can look at a list of all the various types of data you have and by selecting one you can set more specific privacy settings. For example, tapping on Contacts will take you to a list of all the apps that might try to access your contact information. Each app has a switch next to its name so you can manually toggle privacy on and off for each one. This can be changed anytime so if you originally refused an app access to information, you can come back here and grant it access.
Worth looking at in more detail is the Location Services section as misuse of this could have your every move tracked by an app and it can be quite a drain on your battery if your apps are following you around too. if you look at the icon for Location Services, you may notice that it has appeared next to various services in a number of colours. This means your location information has been used one way or another, based on which colour is used for it. Scroll to the bottom and the colours are explained. This section will be able to show you which apps are requesting your location and which ones already have access to it. Of course, some applications will be more useful if they are able to track you, such as Google Maps but otherwise, you can restrict their access here.
Finally, you can also avoid ads that are targeted towards you. These only appear because information has been accessed that shows the type of ad that would appeal to you but you can put a atop to this by opening Settings, going to General and then About. On this screen, scroll down until you get to Advertising and select it. There is an option here called Limit Ad Tracking and enabling this will stop services accessing your Apple Advertising Identifier. Tailor-made ads may be useful to some but the fact they exist is a little bit creepy. It’s better to block them and search for them yourself.
Tricks & Tips