File No. 0-27884

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Issuer
Pursuant to Rule 13a-16 or 15d-16 of
the Securities Exchange Act of 1934

For the month of ~~July~~September, 2007

Macronix International Co., Ltd.

No. 16 Li-Hsing Road,
Science-Based Industrial Park
Hsinchu, Taiwan, Republic of China

[ Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.]

Form 20-F þ Form 40-F o.

[ Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.]

Yes o No þ.

[ If “ Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82: ________.]

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Press Released on September 21,2007
SIGNATURES

~~Table~~Macronix ofintends ~~Contents~~to delist from Nasdaq

Monthly Sales Report- July 2007			3
Regulated Announcement for the month of July 2007			4 ~ 5
Signatures			6

Hsinchu, Taiwan, R.O.C. — Macronix International Co., Ltd. (NASDAQ: MXIC, TSEC: 2337) announced today that it plans to delist its American Depositary Shares (ADS) from Nasdaq, to terminate its American Depositary Receipts (ADR) program and to end the registration of its shares under the US Securities and Exchange Act of 1934, as amended (Exchange Act).

Macronix is continuously seeking to optimize its costs and believes that the ongoing costs of its ADR program are not economically justified by the benefits, given the relatively small proportion of trading that takes place in the form of ADRs. Accordingly, Macronix has decided to delist and deregister its ADRs.

Macronix expects that its listing on Nasdaq will effectively be terminated on or after October 29. As regards deregistration, Macronix plans to file Form 15F with the SEC on or after October 29. Immediately upon filing Form 15F, Macronix will no longer have any obligation to file annual and other reports with the SEC. Macronix expects that deregistration will become effective 90 days after the filing of Form 15F.

A notification will be sent to ADR holders setting forth the termination of the ADR program. Prior to the delisting holders can elect to sell their ADSs over Nasdaq or they are entitled to exchange their ADRs with the Bank of New York, as depositary, for underlying Macronix common shares. Following the delisting during a period of 12 months holders are still entitled to exchange their ADRs for underlying Macronix common shares. At the end of this period any remaining shares underlying the ADRs will be sold, the proceeds of sale will be held for a time by the depositary and the ADRs will represent only the right to receive the cash proceeds of sale of the underlying shares. The dividend record date remains unchanged as September 21, 2007. For further information, please refer to the Investor Information section of the Macronix website www.macronix.com.

Macronix will further develop its business operations in the US, but wishes to concentrate its trading volume at Taiwan Stock Exchange Corporation (TSEC), which reduces complexity and therefore costs. Macronix considers US investors an important part of its investor base and will maintain its relationship with US investors. Macronix will make English translations of its annual reports, financial statements and other press releases available on its web site.

Following the delisting from Nasdaq, Macronix’s common shares will continue to trade on TSEC. The Company has not arranged for listing and/or registration of the Company’s securities on another US securities exchange or for quotation of the Company’s securities on any other quotation medium in the United States.

~~MACRONIX~~About ~~INTERNATIONAL~~Macronix COInternational Co., ~~LTD~~Ltd.

~~For~~Founded ~~the~~in ~~month~~1989, Macronix International Co., Ltd. (TSEC: 2337) is a leading provider of ~~July~~innovative Non-Volatile Memory (NVM) ~~2007~~semiconductor solutions. Macronix is the largest worldwide manufacturer of ROM products, and also provides a wide range of Parallel and Serial NOR Flash products across various densities. Through strong relationships with our customers, we continue to develop pioneering products used in embedded, consumer and enterprise applications.

~~This~~For ismore toinformation, ~~report~~please visit the ~~changes~~Company’s orweb ~~status~~site ofat ~~1) Sales volume 2) Funds lent to other parties 3) Endorsements and guarantees 4) Financial derivative transactions for the period of July 2007~~www.macronix.com.

Sales volume (NT$ : Thousand)


Contacts:
Michelle Chang Macronix International Co., Ltd. Public Relations +03 578 6688 ext. 71233 michellechang@mxic.com.tw		Douglas Sun Macronix International Co., Ltd. Finance Center +03 578 6688 ext. 76632 douglassun@mxic.com.tw

Investor Relations (NY): Delia Cannan, Director Taylor Rafferty 205 Lexington Avenue 8th Floor New York, NY 10016 +1 212-889-4350 macronix@taylor-rafferty.com www.taylor-rafferty.com		Investor Relations (HK): David Dambro, Director Taylor Rafferty 3213 Cosco Tower 183 Queen’s Road Central Hong Kong +852 3196 3712 macronix@taylor-rafferty.com www.taylor-rafferty.com

Time	Item	2007		2006		Changes		(%)
July	Invoice amount		2,018,409		1,832,790		+185,619		10.13	%
July	Net Sales		2,014,927		1,818,853		+196,074		10.78	%

Funds lent to other parties (NT$ : Thousand) : None

Endorsements and guarantees (NT$ : Thousand) :

	Limit of endorsement		July		Bal. As of period end
MXIC		15,977,394		0		1,154,670
MXIC’s subsidiaries		0		0		0
MXIC endorses for subsidiaries				0		1,135,226
MXIC’s subsidiaries endorses for MXIC				0		0
MXIC endorses for PRC companies				0		0
MXIC’s subsidiaries endorses for PRC companies				0		0

Financial derivatives transactions (NT$ : Thousand)

4-1 Trading purpose : None

4-2 Hedging purpose (for assets / liabilities denominated in foreign currencies): None

MACRONIX INTERNATIONAL CO., LTD.

For the month of July 2007

This is to report 1) the trading of directors, supervisors, executive officers and 10% shareholders of MXIC ; 2) the pledge and clear of pledge of MXIC common shares by directors, supervisors, executive officers and 10% shareholders of MXIC ; 3) outstanding units and shares of ADR by MXIC for the month of July 2007.

The trading of directors, supervisors, executive officers and 10% shareholders :

Title	Name	Number of sharesheld when elected(for Directors,Supervisors and Executive Officers)		Number ofshares held asJune 30,2007		Number of sharesheld asJuly 31,2007		Changes
Director	Champion Investment Co., Ltd		2,334,854		2,334,854		2,234,854	-100,000
Director	J.P. Peng		3,455,684		3,446,684		3,437,684	-9,000
Associate Vice President	Allen Dai		0		197,119		682,146	+485,027 (Stock Option)
Associate Vice President	C.H. Hung		0		222,871		177,871	-45,000

The clear of pledge of MXIC common shares by directors, supervisors, executive officers and 10% shareholders : None

Title

Name

Number of the clear of pledge of common shares as of June 30,2007

Date of the clear of pledge

Accumulated number of pledged common shares

Director

Champion Investment Co., Ltd

2,334,854

2007/07/09

1,334,854

The pledge of MXIC common shares by directors, supervisors, executive officers and 10% shareholders : None

Outstanding units and shares of ADR :

Outstanding of units on

Outstanding of shares on

Outstanding of units on

Outstanding of shares on

June 30,2007

July 31,2007

1,524,779.7

15,247,797

1,414,779.7

14,147,797

MACRONIX INTERNATIONAL CO., LTD.

For the month of July 2007

This is to report 1) the acquisition of assets by MXIC and 2) the disposition of assets by MXIC for the month of July 2007.

The acquisition of assets : None

The disposal of assets : None

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused the report to be signed on its behalf by the undersigned, thereunto duly authorized.

	MACRONIX INTERNATIONAL CO., LTD.
Date: August 29, 2007	By:	/s/ Paul Yeh
Date: September 21, 2007	By:	/s/ Paul Yeh
		Name: Paul Yeh
		Name:	Paul Yeh
		Title: Associate Vice President of Finance Center
		Title:	Associate Vice President of Finance Center

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