In one sentence, describe what the following article is about: Make sure you know all the different models, so you know what you're looking for when you get to the dealership. The 1 Series is a rear-wheel drive four-seat car that is best for consumers who are looking for a small, fast luxury vehicle. For the best-selling BMW, you'll want to look for the 3 Series. This is also a small car, but it comes in rear-wheel and all-wheel drive. You can a get a sedan (E90), wagon (E91), coupe (E92), and convertible (E93). This is also a high powered vehicle, but is also known for handling well. If you're looking for something cheaper, consider the older (E46) coupe or cabriolet. The 5 Series is a mid-size sedan that is mostly known as a luxury vehicle. It is available in all-wheel drive. Some even have diesel engines and save costs in fuel consumption, although exhaust parts may need to be replaced more often For the largest sized vehicle, you'll want to look for the 7 Series, which is a luxury sedan that comes with leather seats and often wood trim. This is made for people who can be driven around by people like chauffeurs, otherwise don't waste your cash on it. Based on the 3 Series, the X3 is a small SUV that has a lot of space for hauling whatever you wish. It works well if you have a small family and "occasionally" need to tug a giant amount of items. The most expensive BMW besides the 7 Series is the X5. It's the largest SUV and can be pricey to maintain as well as buy. Be careful of the X5 as they are greatly unreliable and costs start and go upward of $5,000. BMWs are great cars, but they lose value quickly. This can especially be a problem if you plan on reselling your used BMW later on. BMWs do not maintain their value for long. With each passing year, your car loses value at a larger rate than other similarly priced luxury vehicles. Some BMWs don't depreciate as quickly as others. While the 7 Series depreciates especially quickly, the 1 Series and X5 do not. Keep this in mind when choosing the model of BMW you want to purchase. High depreciation cars can also mean that you can find an older BMW for less. The difference between a 3- and 6-year old BMW can be rather large. BMWs can be expensive to maintain, because of general upkeep, as well as costly repairs and issues with reliability. BMWs are expensive to maintain. They require higher quality gasoline, oil, and tires than many other vehicles. Additionally, the labor costs for BMWs are usually higher because of the way they're engineered. This can be avoided by going to second or even third hand repair centres. If the BMW was made before 1999, the car can be serviced by any mechanic specialized, non-specialized or even by the owner (you). Repairs for a BMW can be pricey. It's not hard to find a shop that specializes in these vehicles, but in their Vehicle Monitoring Systems. Local dealerships are usually expensive for repairs, so having a BMW-specialized repair store near you is important for keeping costs down. While BMWs (with the exception of the X5) are generally reliable, they do occasionally need repairs. Some of their reliability issues are due to the use of plastic parts and the expensive electronics that make up the interior of the car. Certain BMW models are known for having common problems. Make sure you know any specific problems with your model. Some of the most common problems for BMWs include: Electrical issues. The BMW has many complex electronics both inside and outside the vehicle. BMWs occasionally have issues with the battery, fuses, and the key control system. Additionally, some internal electronics like power windows and power steering are problematic in BMWs. As mentioned earlier most of these systems are managed and controlled by the vehicle's iDrive System. Engine issues. Since many of the BMWs have turbocharged engines, engine problems are common with these cars. Some issues including stalling, difficulty while idling, and a rough ride. On a second-generation X5, the engine replacements can cost around $5,000. Rattles. BMWs can have strange noises coming from inside or outside the vehicle. These may simply be annoying, but they could also indicate a problem with the vehicle.
Summary: Research the different types of BMWs. Be aware of potential depreciation with a used BMW. Know about the costs of maintaining a used BMW. Read about the potential issues with each model car.

Problem: Article: If your Mac is so frozen that you can't interact with any on-screen items or even move the cursor, skip the next two steps. If you can still interact with some of the on-screen items, you may want to try force-quitting the program that's causing your Mac to freeze. If your Mac froze after you opened a specific application, you can try force-quitting the application by doing the following: Press Command+ Option+Esc to bring up the Force Quit window. Click the program you want to force-quit. Click Force Quit at the bottom of the window. Click Force Quit if prompted. If you've determined that you're unable to force-quit the problematic program, try saving any in-progress work in any responsive programs. You can usually do this by pressing Command+S while in the program's window. Since forcing your Mac to shut down will also cause all open programs to close, you may lose unsaved work. Many programs, such as those in the Microsoft Office suite, will save a backup of your work that you can restore upon restarting your Mac. Most Macs have a physical button with the "Power" {"smallUrl":"https:\/\/www.wikihow.com\/images\/5\/5d\/Windowspower.png","bigUrl":"\/images\/thumb\/5\/5d\/Windowspower.png\/30px-Windowspower.png","smallWidth":460,"smallHeight":460,"bigWidth":"30","bigHeight":"30","licensing":"<div class="mw-parser-output"><p>I edited this screenshot of a Windows icon.
<\/p><p>License: <a rel="nofollow" class="external text" href="http:\/\/en.wikipedia.org\/wiki\/Public_domain">Public Domain<\/a><br>
<\/p><\/div>"} icon that you can press to turn off your Mac: MacBook without Touch Bar The "Power" key is in the top-right side of the keyboard. MacBook with Touch Bar The "Power" button is the Touch ID section on the far-right side of the Touch Bar. iMac You'll find the "Power" button behind the lower-left side of the iMac's screen. Once you've found the "Power" button, press down on it and don't release it until the screen turns off. This signifies that your Mac has turned off. It may take your Mac up to a minute to finish turning off completely, so make sure that your Mac has stopped making noise before you proceed. Once your Mac has shut down entirely, you can press the "Power" button once to turn back on your Mac. When it finishes restarting, your Mac should be unfrozen. If your Mac is still frozen after restarting, try troubleshooting your Mac.
Summary:
Determine the severity of your Mac's condition. Try force-quitting an application. Try to save any open work. Find your Mac's "Power" button. Press and hold the "Power" button. Release the "Power" button when the screen goes black. Turn back on your Mac after a minute.