String formatting is a technique used to manipulate and format strings in a specific way. It is important for developers and system engineers as it allows for dynamic and efficient string manipulation, making it easier to present data in a desired format. In the Apple environment, string formatting can be achieved using the Swift programming language.

Examples:

1. Basic String Formatting:

   let name = "John"
   let age = 25
   let formattedString = String(format: "My name is %@ and I am %d years old.", name, age)
   print(formattedString)

   Output:

   My name is John and I am 25 years old.

2. Formatting Floating-Point Numbers:

   let pi = 3.14159
   let formattedString = String(format: "The value of pi is %.2f", pi)
   print(formattedString)

   Output:

   The value of pi is 3.14

3. Padding and Alignment:

   let name = "John"
   let formattedString = String(format: "Name: %-10s", name)
   print(formattedString)

   Output:

   Name: John      

4. Specifying Width and Precision:

   let value = 123.456
   let formattedString = String(format: "Value: %10.2f", value)
   print(formattedString)

   Output:

   Value:     123.46