Currently, the company's manufacturing facilities are located at the Macungie Assembly Operations plant in Lower Macungie Township, Pennsylvania. Mack Trucks is a top producer in the vocational, on-road-vehicle market, Class 8 through Class 13. It is also the most popular manufacturer of heavy-duty off-road trucks in America.
On August 14, 2008, Mack Trucks announced a major restructuring plan that included:
Relocation of Mack's head office, product development, most support functions, and purchasing functions to Greensboro, North Carolina, in 2009. Mack's parent, Volvo Trucks, already has its North American base in Greensboro.
1900: The Macks open their first bus manufacturing plant. The Mack bus, ordered by a sightseeing company, is delivered.
1902: The Mack Brothers Company established in New York.
1904: The company introduces the name Manhattan on its products.
1905: Allentown selected as the home of main manufacturing operations, and headquarters. A fourth Mack brother, Joseph Mack, becomes a stockholder. Mack begins making rail cars and locomotives.
1910: The Manhattan name changed; from now on, the trucks are known as Mack Trucks. Charles Mack, a fifth Mack brother, joins the company.
1911: The Saurer Motor Truck Company, headed by C.P. Coleman, had the rights to manufacture and sell heavy trucks under the Saurer brand name at its plant in Plainfield, New Jersey. On September 23, 1911, the Saurer Motor Truck Company merged with the Mack Brothers Motor Car Company of Allentown, headed by J. M. Mack, to form the International Motor Truck Company (IMTC). IMTC would continue to make and sell trucks using the Saurer name until 1918. The capitalization of IMTC was $2.6 million total ($1.6m for Saurer, or 61.5%, and $1.0m for Mack Brothers).
1912: Brothers John and Joseph Mack leave.
1919: The United States Army conducts a transcontinental project using Mack Trucks to study the need for national highway systems.
1922: The company name is changed to Mack Trucks, Inc. The bulldog is accepted as the company's corporate symbol.
1932: While recuperating from an operation, Alfred Fellows Masury, Mack's Chief Engineer, carved the first bulldog hood ornament. Masury applied for and received a patent for his design; the bulldog ornament has adorned Mack trucks ever since.
1933: Mack Trucks helps in the building of many American structures, including the Hoover Dam.
1941: Fire Apparatus manufacturing moved from Allentown, PA to Long Island City, NY.
1951: Fire Apparatus manufacturing moved back to Allentown, PA from Long Island City, NY.
1967: Mack Trucks becomes a part of the Signal Oil and Gas Company in a one-for-one exchange for cumulative convertible preferred stock. Later that year Signal changes its name to The Signal Companies, Inc.
1970: Mack moves into its new Allentown world headquarters.
1932: The Bulldog starts to travel on the hoods of Mack trucks.
1934: Production of electric "trolley coaches" began, continuing only until 1943. A total of 290 trolley buses were built, with Portland, Oregon being by far the biggest customer (with 141 total).
1936: The Mack E series introduced. Mack Jr trucks introduced.
1938: Mack trucks is the first company to produce its own heavy-duty diesel engines.
World War II: Mack trucks were used by the military in various capacities, and the company built many heavy-duty trucks to help the allied forces win the day. From 1941 to 1945, the combined armed forces of the United States, Great Britain, France, and Canada took delivery of 35,096 total vehicles. The combat "N Series" (NB, NJU, NM, NO, NR, etc.) accounted for 26,965 of the total. Commercial type vehicles including: trucks, off-highway, fire-trucks, trailers, and buses, accounted for the rest. A total of 2,053 NO models alone were produced from 1940 to 1945. The 7 1/2-ton 6x6 NO was the most important specifically military model, and could be used as a transport or tractor for the 155 mm Long Tom field gun. Mack also built over 2600 power trains for tanks. The Allentown bus plant (5C) built VulteePBY Catalina flying boats as well as components for the BT-13 Valiant Trainer and B-24 Liberator Bombers. More than 700 NJU (5-to-6 ton 4x4) models were in the hands of the U.S. Army by 1942. In 1939 & 1940 the French and British received several hundred NR4 and EXBU models. Mack Trucks ranked 63rd among United States corporations in the value of World War II military production contracts.
1940: L Model series introduced, continuing until 1952.
1950: The Mack A Model series of trucks is introduced, produced until 1953.
1953: The Mack B Model series of trucks is introduced. 127,786 produced until 1966.
1955: The D Model low cab forward city delivery truck entered the market. Access to the engine compartment was possible by the Verti-lift cab. The cab lifted straight up hydraulically, guided by a forklift style mast behind the cab. Two styles of D Models were produced, the first styling had a square grille and no dress up trim. It was produced in 1955 and early 1956. The second styling included a styled grille, cab rear corner windows and stylish emblems and trim. The second styling was built from mid 1956 until the end of the D Model in 1958. A total of 832 D Model Mack Trucks were produced from 1955 until 1958.
1955: The military M123 10 ton 6X6 semi tractor went into production. Developed from the NO, it would be the US Army’s standard until replaced by the M911 starting in 1976. 
1956: City of Hamilton, Bermuda buys first diesel-power fire truck (B85F).
1956: Mack buys the tooling of the Ahrens-Fox Fire Engine Co. and introduced the Mack C Model cab forward fire engine which was an Ahrens-Fox design and the first of the "Cincinnati Cabs" ( later built by the Truck Cab Manufacturing Co. an OEM vendor builder of Cincinnati, Ohio), that have been the staple of the American fire service to this day.
1959: The first aluminum rivetted construction COE (cab-over-engine) family of trucks is introduced: The G Model which had a short production due to a striking resemblance to the Kenworth COE and Mack having the F Model ready for production. A total of 2181 G Model Mack Trucks were produced from 1959 until 1962.
1962: The Second of the COE (cab-over-engine) family of trucks is introduced: The F Model all steel sleeper (FL) or non sleeper (F) is the first of this family of models for Mack.
1965: Mack releases the Super Pumper System, to be used by the New York City fire department. It would help put out 2,200 fires.
1965: The R Model Series introduced, to replace the B Model Series. Some R series models continue in production until 2005.
The heavy duty AC, with its well known tapered hood, was the truck which started the bulldog theme. A 377 cu in (6.2 L) 4 cylinder gasoline engine 4X2 with chain drive, it was strong, reliable, and worked well in rough terrain. Introduced in 1916, there was a great demand because of World War I, over 6000 3 1/2, 5 1/2, and 7 1/2 ton trucks were built for the UK and US military. There were also commercial sales from 1916, the AC was well suited for logging and construction work. A larger version, the AP, built between 1926 and 1938, was an off-road haul truck used on Boulder dam and other large projects. 40,299 ACs had been built when production ended in 1939. 
The N Series was Mack’s first military design, large 6 and 7 1/2 ton 6X6 artillery prime movers. Between its development in the late 1930s and the beginning of production in 1940 US military requirements changed and the truck was not needed. All NMs and most of the larger NOs were exported as foreign aid. After WWII the NO was developed into the successful M 123 semi-tractor. 
The B Models were Mack’s primary vehicle from its introduction in 1953 until it was replaced by the R Series in 1966. They ranged in size from the medium duty B20P gas powered 4X2 to the oversized B873SX turbo-diesel 6X6. B Models were commonly used as semi tractors and in the construction industry. They were also used as fire engines and trucks, sometimes with the roof of the cab removed. 127,786 B Models were built. 
Mack started to produce the R, RW, and U models in 1966 for highway use, and the RD, DM, and all wheel drive RM and DMM Models for construction use. The lightweight RL model followed in 1967, the RW Superliner with a large, rectangular hood and grill in 1977, and the setback front axle RB in the 1990s. All these models featured the same cab; the U, DM, and DMM had the cab offset to the left.
In the 1990s, the R, RW, and U Models were discontinued and the RB was introduced, mostly for severe-duty applications. The hood was modified slightly for the model RB. 2004 was the last year for the RD, and 2006 for the RB and DM. The DM was the last model to use this cab style, and was the last model of this family to be produced. 
As a replacement for the construction models, Mack started to offer the Granite, Granite Bridge-Formula and Granite Axle-back.
Also this model is serving in the Mexican Army as a Troop and Utility Truck in Configuration 6X6 OR 6X4
By 1916 Mack was producing 4 and 6 cylinder gasoline engines, in 2014 they continue to build their engines. Other builder’s engines were often optional, engines from Caterpillar, Cummins, Detroit Diesel, Hercules, Scania, and Waukesha have been used.
Mack started making diesels in 1938, in 1957 the END and turbocharged ENDT 673 diesel were introduced. This 672 cu in (11.0 L) I6 engine family was successful, and remained in production for over 30 years.
In the early 1960s, Mack Truck's executive vice president of product and engineering, Walter May, developed the Maxidyne high-torque rise engine. The engine was introduced as an inline six in 1966, as a V8 in 1970, and as the intercooled inline six 300 series in 1973. This was an industry-changing event. The Maxidyne, with an operating range of 1200-2100 R.P.M, and later 1050-1700 R.P.M., allowed a heavy Class 8 truck to be operated with a 5 speed (Maxitorque) transmission. Previously, heavy trucks typically operated between 1800-2100R.P.M. and were equipped with 10 or more gears.
In 2014 Mack offers three engine series, the 11 L MP 7, 13 L MP8, and 16 L MP10, with 325 hp (242 kW) to 605 hp (451 kW) and 1,200 lb·ft (1,627 N·m) to 2,060 lb·ft (2,793 N·m). 
The company's trademark is the bulldog. It can be found on the front of almost all Mack trucks. A Mack truck with a gold-plated bulldog indicates that the entire truck is made of Mack components. Trucks with another manufacturer's transmission, engine, rear axles or suspension are given the chrome-plated bulldog.
Mack trucks earned this nickname in 1917, during World War I, when the British government purchased the Mack AC model to supply its front lines with troops, food and equipment. British soldiers dubbed the truck the "Bulldog Mack", because they said it had "the tenacity of a bulldog." Its pugnacious, blunt-nosed hood, coupled with its incredible durability, reminded the soldiers of the tenacious qualities of their country's mascot, the British Bulldog.
The logo was first used in 1921 for the AB chain drive models and made the official corporate logo in 1922.
Mack DM series dump trucks appeared prominently in Die Hard 3.
Maximum Overdrive (1986) is a horror tale of machinery come to life which includes a truck stop with various vehicles.
A Mack M915 (LHRT) Line-Haul Replacement Tractor (military version of the Mack Granite GU713 10-wheeler) with a (military version M970 fuel tanker) semi-trailer, will be the vehicle mode for Megatron in Transformers: Dark of the Moon.
A 1984 Mack Superliner, owned by J.R. Collins Pulling Team, is also officially sponsored by Mack. The truck (named "Buckeye Bulldog") runs in the NTPA (National Tractor Pulling Association) in the "Super Semi" class.
In Bad Boys II (2003), a 2000 Mack CX 613 Vision truck is used by the villains.
In the film Cars, Mack is Lightning McQueen's transport, an animated 1985 Mack Super-Liner voiced by John Ratzenberger. Ratzenberger's father drove a Mack truck to deliver oil for three decades. On the "Disney/Pixar Road Trip '06", which promoted the film in a four-month tour of forty-one cities, "Mack" is a 2006 CH Rawhide 460-horsepower Mack truck carrying an Eddie Paul customised Trans Am as "Lightning".